Index: uspace/app/rcutest/rcutest.c
===================================================================
--- uspace/app/rcutest/rcutest.c	(revision af2254ece47fffd627e909e8547dca085773c990)
+++ uspace/app/rcutest/rcutest.c	(revision 84a1a546f62a2ba0f913f8f1bfce8d4bc68d7aa4)
@@ -38,4 +38,5 @@
 #include <stdlib.h>
 #include <stdint.h>
+#include <str_error.h>
 #include <mem.h>
 #include <errno.h>
@@ -780,5 +781,5 @@
 		int ret = thread_create(dummy_fibril, NULL, "urcu-test-worker", &tid);
 		if (EOK != ret) {
-			printf("Failed to create thread '%zu' (error: %d)\n", k + 1, ret);
+			printf("Failed to create thread '%zu' (error: %s)\n", k + 1, str_error_name(ret));
 			return false;
 		}