Index: libcfa/src/concurrency/io/setup.cfa
===================================================================
--- libcfa/src/concurrency/io/setup.cfa	(revision e71e94afb7e0016d752678b114b94246be5a4680)
+++ libcfa/src/concurrency/io/setup.cfa	(revision bf0263c9b7b4fb1f0eeb41eb13f2e11fe44991d3)
@@ -138,5 +138,5 @@
 		__u32 nentries = params_in.num_entries != 0 ? params_in.num_entries : 256;
 		if( !is_pow2(nentries) ) {
-			abort("ERROR: I/O setup 'num_entries' must be a power of 2\n");
+			abort("ERROR: I/O setup 'num_entries' must be a power of 2, was %u\n", nentries);
 		}