Index: libcfa/src/concurrency/io/types.hfa
===================================================================
--- libcfa/src/concurrency/io/types.hfa	(revision 454f478e4ba5abab2a66dcf28ad9efa8a5d7f313)
+++ libcfa/src/concurrency/io/types.hfa	(revision 1adab3e7b648d40ce0b456c60f502607c6016d90)
@@ -21,4 +21,5 @@
 }
 
+#include "bits/locks.hfa"
 #include "kernel/fwd.hfa"