diff --git a/lib/topologies/server.js b/lib/topologies/server.js
index 6e86ab19e..54e14163b 100644
--- a/lib/topologies/server.js
+++ b/lib/topologies/server.js
@@ -312,6 +312,13 @@ var eventHandler = function(self, event) {
         delete servers[self.id];
       }
 
+      if (event === 'close') {
+        // Closing emits a server description changed event going to unknown.
+        sdam.emitServerDescriptionChanged(self, {
+          address: self.name, arbiters: [], hosts: [], passives: [], type: 'Unknown'
+        });
+      }
+
       // Reconnect failed return error
       if(event == 'reconnectFailed') {
         self.emit('reconnectFailed', err);
@@ -331,6 +338,11 @@ var eventHandler = function(self, event) {
 
       // Reconnect event, emit the server
       if(event == 'reconnect') {
+        // Reconnecting emits a server description changed event going from unknown to the
+        // current server type.
+        sdam.emitServerDescriptionChanged(self, {
+          address: self.name, arbiters: [], hosts: [], passives: [], type: sdam.getTopologyType(self)
+        });
         return self.emit(event, self);
       }