diff --git a/tools/db/import-md5-list b/tools/db/import-md5-list
index 6eccad3..ab40c54 100644
--- a/tools/db/import-md5-list
+++ b/tools/db/import-md5-list
@@ -14,6 +14,11 @@
 # $2: <paht of md5-file>
 # [$3]: <path to movie folder>
 
+{ #set enviroemnt
+  true=1      #like <stdbool.h>
+  false=0     #like <stdbool.h>
+}
+
 mode=$(echo $1 | tr -d '-')
 md5="$2"
 moviedir="$3"
@@ -93,10 +98,10 @@ function db_exist_md5() {
   result=($(db_query "SELECT COUNT(md5) FROM File WHERE File.MD5 LIKE '$1';"))
   if [ "${result[2]}" -gt "0" ]; then
     echo true
-    return 0
+    return $true
   else
     echo false
-    return 1
+    return $false
   fi
 }