diff --git a/xpcom/threads/nsEventQueue.cpp b/xpcom/threads/nsEventQueue.cpp
index be48637425b..8e3194f3d08 100644
--- a/xpcom/threads/nsEventQueue.cpp
+++ b/xpcom/threads/nsEventQueue.cpp
@@ -191,7 +191,10 @@ NS_IMETHODIMP
 nsEventQueueImpl::ProcessPendingEvents()
 {
   PRBool correctThread = PL_IsQueueOnCurrentThread(mEventQueue);
+#ifdef DEBUG_dougt
   NS_ASSERTION(correctThread, "attemping to process events on the wrong thread");
+#endif
+
   if (!correctThread)
     return NS_ERROR_FAILURE;
   PL_ProcessPendingEvents(mEventQueue);
@@ -203,7 +206,9 @@ NS_IMETHODIMP
 nsEventQueueImpl::EventLoop()
 {
   PRBool correctThread = PL_IsQueueOnCurrentThread(mEventQueue);
+#ifdef DEBUG_dougt
   NS_ASSERTION(correctThread, "attemping to process events on the wrong thread");
+#endif
   if (!correctThread)
     return NS_ERROR_FAILURE;
 
@@ -230,7 +235,9 @@ NS_IMETHODIMP
 nsEventQueueImpl::HandleEvent(PLEvent* aEvent)
 {
   PRBool correctThread = PL_IsQueueOnCurrentThread(mEventQueue);
+#ifdef DEBUG_dougt
   NS_ASSERTION(correctThread, "attemping to process events on the wrong thread");
+#endif
   if (!correctThread)
     return NS_ERROR_FAILURE;
 
@@ -242,7 +249,9 @@ NS_IMETHODIMP
 nsEventQueueImpl::WaitForEvent(PLEvent** aResult)
 {
     PRBool correctThread = PL_IsQueueOnCurrentThread(mEventQueue);
+#ifdef DEBUG_dougt
     NS_ASSERTION(correctThread, "attemping to process events on the wrong thread");
+#endif
     if (!correctThread)
       return NS_ERROR_FAILURE;