diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 15bf412b5..5b5e7bfae 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -8399,8 +8399,7 @@ dad6_get_pending_addresses (NMDevice *self)
 				addr = nm_ip6_config_get_address (confs[i], j);
 				pl_addr = nm_platform_ip6_address_get (nm_device_get_platform (self),
 				                                       ifindex,
-				                                       addr->address,
-				                                       addr->plen);
+				                                       addr->address);
 				if (   pl_addr
 				    && NM_FLAGS_HAS (pl_addr->n_ifa_flags, IFA_F_TENTATIVE)
 				    && !NM_FLAGS_HAS (pl_addr->n_ifa_flags, IFA_F_DADFAILED)
diff --git a/src/platform/nm-fake-platform.c b/src/platform/nm-fake-platform.c
index 38706f379..835b50cdf 100644
--- a/src/platform/nm-fake-platform.c
+++ b/src/platform/nm-fake-platform.c
@@ -1117,7 +1117,7 @@ ip4_address_get (NMPlatform *platform, int ifindex, in_addr_t addr, guint8 plen,
 }
 
 static const NMPlatformIP6Address *
-ip6_address_get (NMPlatform *platform, int ifindex, struct in6_addr addr, guint8 plen)
+ip6_address_get (NMPlatform *platform, int ifindex, struct in6_addr addr)
 {
 	NMFakePlatformPrivate *priv = NM_FAKE_PLATFORM_GET_PRIVATE ((NMFakePlatform *) platform);
 	int i;
@@ -1126,7 +1126,6 @@ ip6_address_get (NMPlatform *platform, int ifindex, struct in6_addr addr, guint8
 		NMPlatformIP6Address *address = &g_array_index (priv->ip6_addresses, NMPlatformIP6Address, i);
 
 		if (   address->ifindex == ifindex
-		    && address->plen == plen
 		    && IN6_ARE_ADDR_EQUAL (&address->address, &addr))
 			return address;
 	}
diff --git a/src/platform/nm-linux-platform.c b/src/platform/nm-linux-platform.c
index 487725e41..ca20ddf48 100644
--- a/src/platform/nm-linux-platform.c
+++ b/src/platform/nm-linux-platform.c
@@ -5906,7 +5906,7 @@ ip6_address_add (NMPlatform *platform,
 	                             preferred,
 	                             NULL);
 
-	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr, plen);
+	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr);
 	return do_add_addrroute (platform, &obj_id, nlmsg);
 }
 
@@ -5956,7 +5956,7 @@ ip6_address_delete (NMPlatform *platform, int ifindex, struct in6_addr addr, gui
 	if (!nlmsg)
 		g_return_val_if_reached (FALSE);
 
-	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr, plen);
+	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr);
 	return do_delete_object (platform, &obj_id, nlmsg);
 }
 
@@ -5974,12 +5974,12 @@ ip4_address_get (NMPlatform *platform, int ifindex, in_addr_t addr, guint8 plen,
 }
 
 static const NMPlatformIP6Address *
-ip6_address_get (NMPlatform *platform, int ifindex, struct in6_addr addr, guint8 plen)
+ip6_address_get (NMPlatform *platform, int ifindex, struct in6_addr addr)
 {
 	NMPObject obj_id;
 	const NMPObject *obj;
 
-	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr, plen);
+	nmp_object_stackinit_id_ip6_address (&obj_id, ifindex, &addr);
 	obj = nmp_cache_lookup_obj (NM_LINUX_PLATFORM_GET_PRIVATE (platform)->cache, &obj_id);
 	if (nmp_object_is_visible (obj))
 		return &obj->ip6_address;
diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 90be93fd3..7af109dfd 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -2776,13 +2776,11 @@ nm_platform_ip4_address_get (NMPlatform *self, int ifindex, in_addr_t address, g
 }
 
 const NMPlatformIP6Address *
-nm_platform_ip6_address_get (NMPlatform *self, int ifindex, struct in6_addr address, guint8 plen)
+nm_platform_ip6_address_get (NMPlatform *self, int ifindex, struct in6_addr address)
 {
 	_CHECK_SELF (self, klass, NULL);
 
-	g_return_val_if_fail (plen <= 128, NULL);
-
-	return klass->ip6_address_get (self, ifindex, address, plen);
+	return klass->ip6_address_get (self, ifindex, address);
 }
 
 static const NMPlatformIP4Address *
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 1b8fa1331..d6e86d464 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -663,7 +663,7 @@ typedef struct {
 	gboolean (*ip4_address_delete) (NMPlatform *, int ifindex, in_addr_t address, guint8 plen, in_addr_t peer_address);
 	gboolean (*ip6_address_delete) (NMPlatform *, int ifindex, struct in6_addr address, guint8 plen);
 	const NMPlatformIP4Address *(*ip4_address_get) (NMPlatform *, int ifindex, in_addr_t address, guint8 plen, in_addr_t peer_address);
-	const NMPlatformIP6Address *(*ip6_address_get) (NMPlatform *, int ifindex, struct in6_addr address, guint8 plen);
+	const NMPlatformIP6Address *(*ip6_address_get) (NMPlatform *, int ifindex, struct in6_addr address);
 
 	GArray * (*ip4_route_get_all) (NMPlatform *, int ifindex, NMPlatformGetRouteFlags flags);
 	GArray * (*ip6_route_get_all) (NMPlatform *, int ifindex, NMPlatformGetRouteFlags flags);
@@ -938,7 +938,7 @@ NMPlatformError nm_platform_link_sit_add (NMPlatform *self,
                                           const NMPlatformLnkSit *props,
                                           const NMPlatformLink **out_link);
 
-const NMPlatformIP6Address *nm_platform_ip6_address_get (NMPlatform *self, int ifindex, struct in6_addr address, guint8 plen);
+const NMPlatformIP6Address *nm_platform_ip6_address_get (NMPlatform *self, int ifindex, struct in6_addr address);
 GArray *nm_platform_ip4_address_get_all (NMPlatform *self, int ifindex);
 GArray *nm_platform_ip6_address_get_all (NMPlatform *self, int ifindex);
 gboolean nm_platform_ip4_address_add (NMPlatform *self,
diff --git a/src/platform/nmp-object.c b/src/platform/nmp-object.c
index ecec8f0ff..3ea3fbba4 100644
--- a/src/platform/nmp-object.c
+++ b/src/platform/nmp-object.c
@@ -357,20 +357,19 @@ _vt_cmd_obj_stackinit_id_ip4_address (NMPObject *obj, const NMPObject *src)
 }
 
 const NMPObject *
-nmp_object_stackinit_id_ip6_address (NMPObject *obj, int ifindex, const struct in6_addr *address, guint8 plen)
+nmp_object_stackinit_id_ip6_address (NMPObject *obj, int ifindex, const struct in6_addr *address)
 {
 	nmp_object_stackinit (obj, NMP_OBJECT_TYPE_IP6_ADDRESS, NULL);
 	obj->ip4_address.ifindex = ifindex;
 	if (address)
 		obj->ip6_address.address = *address;
-	obj->ip6_address.plen = plen;
 	return obj;
 }
 
 static void
 _vt_cmd_obj_stackinit_id_ip6_address (NMPObject *obj, const NMPObject *src)
 {
-	nmp_object_stackinit_id_ip6_address (obj, src->ip_address.ifindex, &src->ip6_address.address, src->ip_address.plen);
+	nmp_object_stackinit_id_ip6_address (obj, src->ip_address.ifindex, &src->ip6_address.address);
 }
 
 const NMPObject *
diff --git a/src/platform/nmp-object.h b/src/platform/nmp-object.h
index b69680f6b..fb7f713f3 100644
--- a/src/platform/nmp-object.h
+++ b/src/platform/nmp-object.h
@@ -390,7 +390,7 @@ const NMPObject *nmp_object_stackinit (NMPObject *obj, NMPObjectType obj_type, c
 const NMPObject *nmp_object_stackinit_id  (NMPObject *obj, const NMPObject *src);
 const NMPObject *nmp_object_stackinit_id_link (NMPObject *obj, int ifindex);
 const NMPObject *nmp_object_stackinit_id_ip4_address (NMPObject *obj, int ifindex, guint32 address, guint8 plen, guint32 peer_address);
-const NMPObject *nmp_object_stackinit_id_ip6_address (NMPObject *obj, int ifindex, const struct in6_addr *address, guint8 plen);
+const NMPObject *nmp_object_stackinit_id_ip6_address (NMPObject *obj, int ifindex, const struct in6_addr *address);
 const NMPObject *nmp_object_stackinit_id_ip4_route (NMPObject *obj, int ifindex, guint32 network, guint8 plen, guint32 metric);
 const NMPObject *nmp_object_stackinit_id_ip6_route (NMPObject *obj, int ifindex, const struct in6_addr *network, guint8 plen, guint32 metric);
 
diff --git a/src/platform/tests/test-address.c b/src/platform/tests/test-address.c
index 4c139ef00..ae8cfc547 100644
--- a/src/platform/tests/test-address.c
+++ b/src/platform/tests/test-address.c
@@ -143,9 +143,9 @@ test_ip6_address_general (void)
 	inet_pton (AF_INET6, IP6_ADDRESS, &addr);
 
 	/* Add address */
-	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 	nmtstp_ip6_address_add (NULL, EX, ifindex, addr, IP6_PLEN, in6addr_any, lifetime, preferred, flags);
-	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 	accept_signal (address_added);
 
 	/* Add address again (aka update) */
@@ -164,7 +164,7 @@ test_ip6_address_general (void)
 
 	/* Remove address */
 	nmtstp_ip6_address_del (NULL, EX, ifindex, addr, IP6_PLEN);
-	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 	accept_signal (address_removed);
 
 	/* Remove address again */
@@ -229,20 +229,20 @@ test_ip6_address_general_2 (void)
 	/* Add/delete notification */
 	nmtstp_ip6_address_add (NULL, EX, ifindex, addr, IP6_PLEN, in6addr_any, lifetime, preferred, 0);
 	accept_signal (address_added);
-	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 
 	nmtstp_ip6_address_del (NULL, EX, ifindex, addr, IP6_PLEN);
 	accept_signal (address_removed);
-	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (!nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 
 	/* Add/delete conflict */
 	nmtstp_ip6_address_add (NULL, EX, ifindex, addr, IP6_PLEN, in6addr_any, lifetime, preferred, 0);
 	accept_signal (address_added);
-	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 
 	nmtstp_ip6_address_add (NULL, EX, ifindex, addr, IP6_PLEN, in6addr_any, lifetime, preferred, flags);
 	ensure_no_signal (address_added);
-	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr, IP6_PLEN));
+	g_assert (nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, addr));
 
 	free_signal (address_added);
 	free_signal (address_removed);
diff --git a/src/platform/tests/test-common.c b/src/platform/tests/test-common.c
index a9d0694d9..76c18a187 100644
--- a/src/platform/tests/test-common.c
+++ b/src/platform/tests/test-common.c
@@ -717,7 +717,7 @@ _ip_address_add (NMPlatform *platform,
 			g_assert (label == NULL);
 			g_assert (flags == 0);
 
-			a = nm_platform_ip6_address_get (platform, ifindex, address->addr6, plen);
+			a = nm_platform_ip6_address_get (platform, ifindex, address->addr6);
 			if (   a
 			    && !memcmp (nm_platform_ip6_address_get_peer (a),
 			                (IN6_IS_ADDR_UNSPECIFIED (&peer_address->addr6) || IN6_ARE_ADDR_EQUAL (&address->addr6, &peer_address->addr6))
@@ -861,7 +861,7 @@ _ip_address_del (NMPlatform *platform,
 		if (is_v4)
 			had_address = !!nm_platform_ip4_address_get (platform, ifindex, address->addr4, plen, peer_address->addr4);
 		else
-			had_address = !!nm_platform_ip6_address_get (platform, ifindex, address->addr6, plen);
+			had_address = !!nm_platform_ip6_address_get (platform, ifindex, address->addr6);
 
 		if (is_v4) {
 			success = nmtstp_run_command ("ip address delete %s%s%s/%d dev %s",
@@ -913,7 +913,7 @@ _ip_address_del (NMPlatform *platform,
 		} else {
 			const NMPlatformIP6Address *a;
 
-			a = nm_platform_ip6_address_get (platform, ifindex, address->addr6, plen);
+			a = nm_platform_ip6_address_get (platform, ifindex, address->addr6);
 			if (!a)
 				break;
 		}
diff --git a/src/platform/tests/test-route.c b/src/platform/tests/test-route.c
index 6862f13e0..257f4062b 100644
--- a/src/platform/tests/test-route.c
+++ b/src/platform/tests/test-route.c
@@ -268,7 +268,7 @@ test_ip6_route (void)
 
 		nmtstp_wait_for_signal (NM_PLATFORM_GET, 50);
 		nm_platform_process_events (NM_PLATFORM_GET);
-		plt_addr = nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, pref_src, 128);
+		plt_addr = nm_platform_ip6_address_get (NM_PLATFORM_GET, ifindex, pref_src);
 		if (plt_addr && !NM_FLAGS_HAS (plt_addr->n_ifa_flags, IFA_F_TENTATIVE))
 			break;
 	});