Index: libcfa/src/bits/locks.hfa
===================================================================
--- libcfa/src/bits/locks.hfa	(revision 8e16177bb7b956e44e21fd62743a6133acab4b8b)
+++ libcfa/src/bits/locks.hfa	(revision 0dedf027202c89ef63598af56c5d871dd58bf91c)
@@ -115,5 +115,5 @@
 		char * strerror(int);
 	}
-	#define CHECKED(x) { int err = x; if( err != 0 ) abort("KERNEL ERROR: %s\n", strerror(err)); }
+	#define CHECKED(x) { int err = x; if( err != 0 ) abort("KERNEL ERROR: Operation \"" #x "\" return error %d - %s\n", err, strerror(err)); }
 
 	struct __bin_sem_t {