diff --git a/indra/llcorehttp/_httpreplyqueue.h b/indra/llcorehttp/_httpreplyqueue.h
index 0e39e22dde5dac157364935070e431dd95f14d7f..928ee10a838bd825a2a276372191567c4004db87 100644
--- a/indra/llcorehttp/_httpreplyqueue.h
+++ b/indra/llcorehttp/_httpreplyqueue.h
@@ -30,6 +30,7 @@
 
 #include "_refcounted.h"
 #include "_mutex.h"
+#include "boost/noncopyable.hpp"
 
 
 namespace LLCore