Index: libcfa/src/bits/locks.hfa
===================================================================
--- libcfa/src/bits/locks.hfa	(revision 171ca0ddcab2e5e9c19608a819ac47a1cff1d8cd)
+++ libcfa/src/bits/locks.hfa	(revision 6ec07e5f9016c92f73237be92c20ecdd0fba5795)
@@ -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 {