Index: libcfa/src/bits/locks.hfa
===================================================================
--- libcfa/src/bits/locks.hfa	(revision c66f6cb71ed15bdf7843d630c7719f87d009b25d)
+++ libcfa/src/bits/locks.hfa	(revision 730f4f153cdc265f2cb9a7c7ff64a8e3c629cb76)
@@ -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 {