diff --git a/scripts/CREATE_VERSION.sh b/scripts/CREATE_VERSION.sh
index 77d061a8a..450f21370 100644
--- a/scripts/CREATE_VERSION.sh
+++ b/scripts/CREATE_VERSION.sh
@@ -10,4 +10,6 @@
 
 echo "Building version_tag.h with git describe"
 tmp=`git describe | sed -e 's;\(.*\);#define VERSION_TAG "\1";'`
-echo "$tmp" > version_tag.h
+echo "#ifndef VERSION_TAG" > version_tag.h
+echo "$tmp" >> version_tag.h
+echo "#endif" >> version_tag.h