Index: libcfa/src/concurrency/io/call.cfa.in
===================================================================
--- libcfa/src/concurrency/io/call.cfa.in	(revision 8fc652e01c609dd8c3f392cd9de90efc31e0d6b2)
+++ libcfa/src/concurrency/io/call.cfa.in	(revision fe9468e277ef63e8b357a912be5295032d77be2c)
@@ -84,5 +84,5 @@
 
 		/* paranoid */ verifyf( cltr->io.ctxs, "default io contexts for cluster %p are missing\\n", cltr);
-		return &cltr->io.ctxs[ __tls_rand() % cltr->io.cnt ];
+		return &cltr->io.ctxs[ thread_rand() % cltr->io.cnt ];
 	}
 #endif