diff --git a/introspection/org.freedesktop.ModemManager1.Sms.xml b/introspection/org.freedesktop.ModemManager1.Sms.xml
index e382bd95..acdd2120 100644
--- a/introspection/org.freedesktop.ModemManager1.Sms.xml
+++ b/introspection/org.freedesktop.ModemManager1.Sms.xml
@@ -120,12 +120,28 @@
     <!--
         Timestamp:
 
-        Time message was received or was sent, in
+        Time when the first PDU of the SMS message arrived the SMSC, in
         <ulink url="http://en.wikipedia.org/wiki/ISO_8601">ISO8601</ulink>
         format.
+        This field is only applicable if the PDU type is
+        <link linkend="MM-SMS-PDU-TYPE-DELIVER:CAPS"><constant>MM_SMS_PDU_TYPE_DELIVER</constant></link>.
+        or
+        <link linkend="MM-SMS-PDU-TYPE-STATUS-REPORT:CAPS"><constant>MM_SMS_PDU_TYPE_STATUS_REPORT</constant></link>.
     -->
     <property name="Timestamp" type="s" access="read" />
 
+    <!--
+        DischargeTimestamp:
+
+        Time when the first PDU of the SMS message left the SMSC, in
+        <ulink url="http://en.wikipedia.org/wiki/ISO_8601">ISO8601</ulink>
+        format.
+
+        This field is only applicable if the PDU type is
+        <link linkend="MM-SMS-PDU-TYPE-STATUS-REPORT:CAPS"><constant>MM_SMS_PDU_TYPE_STATUS_REPORT</constant></link>.
+    -->
+    <property name="DischargeTimestamp" type="s" access="read" />
+
     <!--
         Storage:
 
diff --git a/src/mm-sms-part.c b/src/mm-sms-part.c
index d252a85e..a42c8f53 100644
--- a/src/mm-sms-part.c
+++ b/src/mm-sms-part.c
@@ -321,6 +321,7 @@ struct _MMSmsPart {
     MMSmsPduType pdu_type;
     gchar *smsc;
     gchar *timestamp;
+    gchar *discharge_timestamp;
     gchar *number;
     gchar *text;
     MMSmsEncoding encoding;
@@ -339,6 +340,7 @@ struct _MMSmsPart {
 void
 mm_sms_part_free (MMSmsPart *self)
 {
+    g_free (self->discharge_timestamp);
     g_free (self->timestamp);
     g_free (self->smsc);
     g_free (self->number);
@@ -390,6 +392,8 @@ PART_GET_FUNC (const gchar *, number)
 PART_SET_TAKE_STR_FUNC (number)
 PART_GET_FUNC (const gchar *, timestamp)
 PART_SET_TAKE_STR_FUNC (timestamp)
+PART_GET_FUNC (const gchar *, discharge_timestamp)
+PART_SET_TAKE_STR_FUNC (discharge_timestamp)
 PART_GET_FUNC (guint, concat_max)
 PART_SET_FUNC (guint, concat_max)
 PART_GET_FUNC (guint, concat_sequence)
@@ -680,8 +684,8 @@ mm_sms_part_new_from_binary_pdu (guint index,
         offset += 7;
 
         /* ------ Discharge Timestamp (7 bytes) ------ */
-        mm_sms_part_take_timestamp (sms_part,
-                                    sms_decode_timestamp (&pdu[offset]));
+        mm_sms_part_take_discharge_timestamp (sms_part,
+                                              sms_decode_timestamp (&pdu[offset]));
         offset += 7;
 
         /* ----- TP-STATUS (1 byte) ------ */
diff --git a/src/mm-sms-part.h b/src/mm-sms-part.h
index 2d61e99e..c64914c7 100644
--- a/src/mm-sms-part.h
+++ b/src/mm-sms-part.h
@@ -74,6 +74,12 @@ void              mm_sms_part_set_timestamp          (MMSmsPart *part,
 void              mm_sms_part_take_timestamp         (MMSmsPart *part,
                                                       gchar *timestamp);
 
+const gchar      *mm_sms_part_get_discharge_timestamp  (MMSmsPart *part);
+void              mm_sms_part_set_discharge_timestamp  (MMSmsPart *part,
+                                                        const gchar *timestamp);
+void              mm_sms_part_take_discharge_timestamp (MMSmsPart *part,
+                                                        gchar *timestamp);
+
 const gchar      *mm_sms_part_get_text               (MMSmsPart *part);
 void              mm_sms_part_set_text               (MMSmsPart *part,
                                                       const gchar *text);
diff --git a/src/mm-sms.c b/src/mm-sms.c
index affe92d3..20dcc0da 100644
--- a/src/mm-sms.c
+++ b/src/mm-sms.c
@@ -1182,8 +1182,9 @@ assemble_sms (MMSms *self,
                   "smsc",      mm_sms_part_get_smsc (sorted_parts[0]),
                   "class",     mm_sms_part_get_class (sorted_parts[0]),
                   "number",    mm_sms_part_get_number (sorted_parts[0]),
-                  "timestamp", mm_sms_part_get_timestamp (sorted_parts[0]),
                   "validity",  mm_sms_part_get_validity (sorted_parts[0]),
+                  "timestamp",               mm_sms_part_get_timestamp (sorted_parts[0]),
+                  "discharge-timestamp",     mm_sms_part_get_discharge_timestamp (sorted_parts[0]),
                   /* delivery report request usually set in the last part only */
                   "delivery-report-request", mm_sms_part_get_delivery_report_request (sorted_parts[self->priv->max_parts - 1]),
                   NULL);