diff --git a/build_tools/make_buildopts_h b/build_tools/make_buildopts_h
index 62cba7dd85442ae79b00ec40575fa5698c43777f..87271ec49b910112dc092417d0472101870786eb 100755
--- a/build_tools/make_buildopts_h
+++ b/build_tools/make_buildopts_h
@@ -22,8 +22,8 @@ then
 	TMP="${TMP} AST_DEVMODE"
 fi
 
-case ${OSARCH} in
-*BSD)
+case ${OSARCH} in	# actually we should check build_os
+*BSD|mingw*)
 	BUILDSUM=`echo ${TMP} | md5`
 	echo "#define AST_BUILDOPT_SUM {0x0, 0x0, 0x0, 0x0} /* dummy */"
 	;;