diff --git a/hptoad.py b/hptoad.py
index 6182001..e093cf4 100755
--- a/hptoad.py
+++ b/hptoad.py
@@ -89,7 +89,7 @@ class Zhobe:
         if not self._cmd_validator_regexp.match(cmd[0]):
             return None, "Bad command \"%s\"" % cmd[0]
 
-        path = "%s/%s" % (dir_path, self.trim(cmd[0][1:]))
+        path = os.path.join(dir_path, self.trim(cmd[0][1:]))
 
         if not os.access(path, os.F_OK):
             return None, "\"%s\" does not exist" % path