Index: libcfa/src/concurrency/iocall.cfa
===================================================================
--- libcfa/src/concurrency/iocall.cfa	(revision 5db836e74259bdb0b92bdce62919db57fd1efd5b)
+++ libcfa/src/concurrency/iocall.cfa	(revision cf48a146accf290d37d8e7202c30e8b5c1d320f9)
@@ -72,4 +72,5 @@
 
 // Some forward declarations
+#include <errno.h>
 #include <unistd.h>