diff --git a/indra/llcommon/llevents.cpp b/indra/llcommon/llevents.cpp
index 84a6620a77782b82cb764b0d1691ee9a52919bd9..b8a594b9bc5fdf954cb58f398a4b3f8f48f9de23 100644
--- a/indra/llcommon/llevents.cpp
+++ b/indra/llcommon/llevents.cpp
@@ -475,7 +475,7 @@ void LLEventPump::stopListening(const std::string& name)
 *****************************************************************************/
 bool LLEventStream::post(const LLSD& event)
 {
-    if (! mEnabled)
+    if (! mEnabled || !mSignal)
     {
         return false;
     }