diff --git a/dom/base/Console.cpp b/dom/base/Console.cpp
index f22ae0f9f93..3b5d738d13c 100644
--- a/dom/base/Console.cpp
+++ b/dom/base/Console.cpp
@@ -918,7 +918,7 @@ Console::Notify(nsITimer *timer)
     delete data;
   }
 
-  if (mQueuedCalls.isEmpty()) {
+  if (mQueuedCalls.isEmpty() && mTimer) {
     mTimer->Cancel();
     mTimer = nullptr;
   }