diff --git a/script/sort-file b/script/sort-symbol-file
similarity index 70%
rename from script/sort-file
rename to script/sort-symbol-file
index 2601742..53b9346 100644
--- a/script/sort-file
+++ b/script/sort-symbol-file
@@ -8,4 +8,6 @@ if [ $# -eq 0 ]
     exit 1
 fi
 
-awk 1 $1 | sort -k2 -t' '
\ No newline at end of file
+mv $1 "$1.bak"
+awk 1 "$1.bak" | sort -k2 -t' ' > $1
+rm "$1.bak"
\ No newline at end of file