diff --git a/content/media/video/src/nsMediaDecoder.cpp b/content/media/video/src/nsMediaDecoder.cpp
index 21561fd6913b..ddae12df22e4 100644
--- a/content/media/video/src/nsMediaDecoder.cpp
+++ b/content/media/video/src/nsMediaDecoder.cpp
@@ -146,7 +146,7 @@ void nsMediaDecoder::Invalidate()
     }
   }
   nsRect r(nsPoint(0,0), frame->GetSize());
-  frame->Invalidate(r, PR_FALSE);
+  frame->Invalidate(r);
 }
 
 static void ProgressCallback(nsITimer* aTimer, void* aClosure)