Index: tests/concurrent/thread.cfa
===================================================================
--- tests/concurrent/thread.cfa	(revision fd54fef231baeeb0016103bf19cc8e6d87287faf)
+++ tests/concurrent/thread.cfa	(revision f6664bf20cd0bee167a481acde6d2d076339a035)
@@ -1,4 +1,5 @@
 #include <fstream.hfa>
 #include <kernel.hfa>
+#include <locks.hfa>
 #include <stdlib.hfa>
 #include <thread.hfa>