diff --git a/config/mh-i386win32 b/config/mh-i386win32
index e00565da2b..641f4331db 100644
--- a/config/mh-i386win32
+++ b/config/mh-i386win32
@@ -5,6 +5,7 @@ CC_FOR_BUILD=gcc
 HOST_CC=gcc
 HOST_CFLAGS=
 CFLAGS=-O2
+CXXFLAGS=-O2 
 HOST_PREFIX=foo
 HOST_PREFIX_1=foo
 RANLIB=i386-win32-ranlib