diff --git a/telecomm/java/android/telecom/ConnectionService.java b/telecomm/java/android/telecom/ConnectionService.java
index dec7b762459dc..6af01aee86b9e 100644
--- a/telecomm/java/android/telecom/ConnectionService.java
+++ b/telecomm/java/android/telecom/ConnectionService.java
@@ -1466,8 +1466,9 @@ public abstract class ConnectionService extends Service {
         }
         Log.d(this, "createConnection, connection: %s", connection);
         if (connection == null) {
+            Log.i(this, "createConnection, implementation returned null connection.");
             connection = Connection.createFailedConnection(
-                    new DisconnectCause(DisconnectCause.ERROR));
+                    new DisconnectCause(DisconnectCause.ERROR, "IMPL_RETURNED_NULL_CONNECTION"));
         }
 
         connection.setTelecomCallId(callId);