diff --git a/sys/rump/include/rump/rump_syscalls_compat.h b/sys/rump/include/rump/rump_syscalls_compat.h
index f357e8937424..524252474368 100644
--- a/sys/rump/include/rump/rump_syscalls_compat.h
+++ b/sys/rump/include/rump/rump_syscalls_compat.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: rump_syscalls_compat.h,v 1.8 2012/07/20 09:10:23 pooka Exp $	*/
+/*	$NetBSD: rump_syscalls_compat.h,v 1.9 2013/01/17 21:12:39 pooka Exp $	*/
 
 /*-
  * Copyright (c) 2010, 2011 Antti Kantee.  All Rights Reserved.
@@ -54,7 +54,11 @@
 #else /* !__NetBSD__ */
 
 #ifndef __RENAME
+#ifdef __ELF
 #define __RUMPSTRINGIFY(x) #x
+#else
+#define __RUMPSTRINGIFY(x) "_"#x
+#endif /* __ELF__ */
 #define __RENAME(x) __asm(__RUMPSTRINGIFY(x))
 #endif /* __RENAME */