Index: tests/concurrent/thread.cfa
===================================================================
--- tests/concurrent/thread.cfa	(revision fd54fef231baeeb0016103bf19cc8e6d87287faf)
+++ tests/concurrent/thread.cfa	(revision f6fd42aa358100528af7c4b3b842d1b9b9ffac80)
@@ -1,4 +1,5 @@
 #include <fstream.hfa>
 #include <kernel.hfa>
+#include <locks.hfa>
 #include <stdlib.hfa>
 #include <thread.hfa>