Index: src/libcfa/concurrency/kernel
===================================================================
--- src/libcfa/concurrency/kernel	(revision 09800e9b5b749cee9e6635061d104d0b3b63c527)
+++ src/libcfa/concurrency/kernel	(revision 2a6c11538c985073491173df0fbbc1adc2fdb62b)
@@ -23,4 +23,5 @@
 extern "C" {
 #include <pthread.h>
+#include <semaphore.h>
 }
 
@@ -131,4 +132,5 @@
 
 	// Idle lock
+	sem_t idleLock;
 
 	// Link lists fields