diff --git a/mozilla/netwerk/test/TestWriteStream.cpp b/mozilla/netwerk/test/TestWriteStream.cpp
index 92952a89cdd..6494e3fea42 100644
--- a/mozilla/netwerk/test/TestWriteStream.cpp
+++ b/mozilla/netwerk/test/TestWriteStream.cpp
@@ -43,6 +43,7 @@
 #include "nsCOMPtr.h"
 #include "nsIMemory.h"
 #include "nsString.h"
+#include "nsCRT.h"
 #include "nsIFileStream.h"
 #include "nsIStreamListener.h"
 #include "nsIEventQueueService.h"