diff --git a/bin/var_editor.py b/bin/var_editor.py
index b2a7966..72a5935 100755
--- a/bin/var_editor.py
+++ b/bin/var_editor.py
@@ -19,7 +19,7 @@ def main():
         if opt == '-k':
             key = val
         elif opt == '-K':
-            key = open(arg, 'rb').read()
+            key = open(val, 'rb').read()
     
     if key == '':
         usage()