Index: src/libcfa/concurrency/thread
===================================================================
--- src/libcfa/concurrency/thread	(revision de6319f37ab741ed2ba4232a93ee62c240717bcd)
+++ src/libcfa/concurrency/thread	(revision f3152ab270e6034396890d42c89e13e36539423c)
@@ -20,4 +20,5 @@
 
 #include "coroutine"
+#include "kernel"
 #include "monitor"