diff --git a/xpcom/tests/TestBuffers.cpp b/xpcom/tests/TestBuffers.cpp
index 3cf505bb8b03..9820c8bb4858 100644
--- a/xpcom/tests/TestBuffers.cpp
+++ b/xpcom/tests/TestBuffers.cpp
@@ -23,7 +23,6 @@
 
 #include "nsIBuffer.h"
 #include "nsIThread.h"
-#include "nsIBaseStream.h"
 #include "nsIComponentManager.h"
 #include "nsIServiceManager.h"
 #include "nsAutoLock.h"