diff --git a/regress/lib/libc/convfp/Makefile b/regress/lib/libc/convfp/Makefile
index e890d97763fb..70eff44402df 100644
--- a/regress/lib/libc/convfp/Makefile
+++ b/regress/lib/libc/convfp/Makefile
@@ -1,8 +1,9 @@
-#	$NetBSD: Makefile,v 1.1 2003/05/03 19:33:52 martin Exp $
+#	$NetBSD: Makefile,v 1.2 2007/11/07 00:08:50 martin Exp $
 
 NOMAN=		# defined
 
 PROG=		convfp
+CFLAGS+=	-O0
 
 regress: ${PROG}
 	@./${PROG}