diff --git a/cross-make-mingw.sh b/cross-make-mingw.sh
index c6dbe377..604ced10 100755
--- a/cross-make-mingw.sh
+++ b/cross-make-mingw.sh
@@ -3,4 +3,8 @@
 export CC=i586-mingw32msvc-gcc
 export WINDRES=i586-mingw32msvc-windres
 export PLATFORM=mingw32
+if [ !$ARCH ]
+then
+export ARCH=x86
+fi
 exec make $*