diff --git a/tools/mapmerge/clean_map_git.sh b/tools/mapmerge/clean_map_git.sh
old mode 100644
new mode 100755
index 1a0c9d6592..e8ad8165e4
--- a/tools/mapmerge/clean_map_git.sh
+++ b/tools/mapmerge/clean_map_git.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 for i in {1..6}
 do
@@ -7,4 +7,4 @@ do
 	git show HEAD:maps/$MAPFILE > tmp.dmm
 	java -jar MapPatcher.jar -clean tmp.dmm '../../maps/'$MAPFILE '../../maps/'$MAPFILE
 	rm tmp.dmm
-done
\ No newline at end of file
+done