diff --git a/libnm-glib/nm-device.c b/libnm-glib/nm-device.c
index 606510639..7bfe5974c 100644
--- a/libnm-glib/nm-device.c
+++ b/libnm-glib/nm-device.c
@@ -323,8 +323,11 @@ get_product_and_vendor (DBusGConnection *connection,
     }
 
 	if (parent && tmp_product && tmp_vendor) {
-		*product = g_strdup (tmp_product);
-		*vendor = g_strdup (tmp_vendor);
+		*product = tmp_product;
+		*vendor = tmp_vendor;
+	} else {
+		g_free (tmp_product);
+		g_free (tmp_vendor);
 	}
 	g_object_unref (proxy);