Index: src/libcfa/concurrency/thread
===================================================================
--- src/libcfa/concurrency/thread	(revision de6319f37ab741ed2ba4232a93ee62c240717bcd)
+++ src/libcfa/concurrency/thread	(revision 44bca7f23e3aeeef424982f0cb5995957e13f44c)
@@ -20,4 +20,5 @@
 
 #include "coroutine"
+#include "kernel"
 #include "monitor"