diff --git a/dom/base/nsDOMNavigationTiming.h b/dom/base/nsDOMNavigationTiming.h
index 73c0a9041b..c79a3f5765 100644
--- a/dom/base/nsDOMNavigationTiming.h
+++ b/dom/base/nsDOMNavigationTiming.h
@@ -162,7 +162,6 @@ public:
 
   inline DOMHighResTimeStamp TimeStampToDOMHighRes(mozilla::TimeStamp aStamp) const
   {
-    MOZ_ASSERT(!aStamp.IsNull(), "The timestamp should not be null");
     if (aStamp.IsNull()) {
       return 0;
     }