diff --git a/sys/arch/sh5/conf/Makefile.sh5 b/sys/arch/sh5/conf/Makefile.sh5
index 70948c4b3904..571d9ce636ee 100644
--- a/sys/arch/sh5/conf/Makefile.sh5
+++ b/sys/arch/sh5/conf/Makefile.sh5
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.sh5,v 1.12 2004/03/17 20:20:43 scw Exp $
+#	$NetBSD: Makefile.sh5,v 1.13 2004/05/14 08:58:32 he Exp $
 
 # Makefile for NetBSD/sh5
 #
@@ -66,6 +66,10 @@ CFLAGS+=	${SH5_ENDIAN_CC} -m5-${SH5_ABI}media-nofpu
 AFLAGS+=	${SH5_ENDIAN_CC} -m5-${SH5_ABI}media-nofpu
 AFLAGS+=	-x assembler-with-cpp -traditional-cpp
 
+# The sh5 gcc version 3.3.3 (NetBSD nb2 20040502) gets an internal
+# compiler error with higher optimizations on a few files:
+CC_NOOPT=	${NORMAL_C:C/-O./-O0/}
+
 ##
 ## (3) libkern and compat
 ##
diff --git a/sys/arch/sh5/conf/files.sh5 b/sys/arch/sh5/conf/files.sh5
index f7fab5a6f82d..d37c5bce741e 100644
--- a/sys/arch/sh5/conf/files.sh5
+++ b/sys/arch/sh5/conf/files.sh5
@@ -1,4 +1,4 @@
-#	$NetBSD: files.sh5,v 1.13 2003/10/05 09:57:47 scw Exp $
+#	$NetBSD: files.sh5,v 1.14 2004/05/14 08:58:32 he Exp $
 
 
 #
@@ -155,3 +155,6 @@ file	netns/ns_cksum.c			ns
 defflag	opt_sh5_debug.h		SH5_SIM SH5_DEBUG_ST50
 defparam opt_sh5_cpu.h		SH5_CPU_SPEED
 defparam opt_kernel_ipt.h	KERNEL_IPT_SIZE
+
+# special compiler settings (no optimization for a few files)
+file	miscfs/genfs/genfs_vnops.c compile-with "${CC_NOOPT}"