diff --git a/ChangeLog b/ChangeLog
index 5c37084d99..d8e58548ef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2008-10-22  Dan Williams  <dcbw@redhat.com>
+
+	* include/NetworkManager.h
+	  introspection/nm-device.xml
+		- Add device state change reason for carrier changes
+
+	* src/nm-device-ethernet.c
+		- (set_carrier): use the carrier change reason when changing device
+			state in response to carrier changes
+
 2008-10-21  Dan Williams  <dcbw@redhat.com>
 
 	* src/NetworkManagerPolicy.c
diff --git a/include/NetworkManager.h b/include/NetworkManager.h
index 05f717ccd8..6700145e3e 100644
--- a/include/NetworkManager.h
+++ b/include/NetworkManager.h
@@ -337,6 +337,9 @@ typedef enum {
 	/* Device disconnected by user or client */
 	NM_DEVICE_STATE_REASON_USER_REQUESTED,
 
+	/* Carrier/link changed */
+	NM_DEVICE_STATE_REASON_CARRIER,
+
 	/* Unused */
 	NM_DEVICE_STATE_REASON_LAST = 0xFFFF
 } NMDeviceStateReason;
diff --git a/introspection/nm-device.xml b/introspection/nm-device.xml
index ec7b0606d2..8671cd3598 100644
--- a/introspection/nm-device.xml
+++ b/introspection/nm-device.xml
@@ -339,6 +339,11 @@
         <tp:docstring>
           A user or client requested the disconnection.
         </tp:docstring>
+      </tp:enumvalue>
+      <tp:enumvalue suffix="CARRIER" value="40">
+        <tp:docstring>
+          The device's carrier/link changed.
+        </tp:docstring>
       </tp:enumvalue>
 	</tp:enum>
 
diff --git a/src/nm-device-ethernet.c b/src/nm-device-ethernet.c
index 0634bc50f0..db25dc1a22 100644
--- a/src/nm-device-ethernet.c
+++ b/src/nm-device-ethernet.c
@@ -190,10 +190,10 @@ set_carrier (NMDeviceEthernet *self, const gboolean carrier)
 nm_info ("(%s): carrier now %s (device state %d)", nm_device_get_iface (NM_DEVICE (self)), carrier ? "ON" : "OFF", state);
 	if (state == NM_DEVICE_STATE_UNAVAILABLE) {
 		if (carrier)
-			nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_DISCONNECTED, NM_DEVICE_STATE_REASON_NONE);
+			nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_DISCONNECTED, NM_DEVICE_STATE_REASON_CARRIER);
 	} else if (state >= NM_DEVICE_STATE_DISCONNECTED) {
 		if (!carrier)
-			nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_UNAVAILABLE, NM_DEVICE_STATE_REASON_NONE);
+			nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_UNAVAILABLE, NM_DEVICE_STATE_REASON_CARRIER);
 	}
 }