diff --git a/dom/ipc/AudioParent.cpp b/dom/ipc/AudioParent.cpp
index 85c311e5b7c..abd0a457b00 100644
--- a/dom/ipc/AudioParent.cpp
+++ b/dom/ipc/AudioParent.cpp
@@ -159,7 +159,7 @@ AudioParent::Notify(nsITimer* timer)
 
   NS_ASSERTION(mStream, "AudioStream not initialized.");
   PRInt64 offset = mStream->GetSampleOffset();
-  unused << SendSampleOffsetUpdate(offset, PR_IntervalNow());
+  SendSampleOffsetUpdate(offset, PR_IntervalNow());
   return NS_OK;
 }