diff --git a/lib/plugins/authpdo/auth.php b/lib/plugins/authpdo/auth.php
index 64ef941153b8056bb5589ba0e3f0196009e2d569..5eb70c95ddc58d6bd7a11142144cd03488f02031 100644
--- a/lib/plugins/authpdo/auth.php
+++ b/lib/plugins/authpdo/auth.php
@@ -179,7 +179,7 @@ class auth_plugin_authpdo extends DokuWiki_Auth_Plugin {
             return $passhash->verify_hash($pass, $userdata['hash']);
         } else {
             // clear text password in the database O_o
-            return ($pass == $userdata['clear']);
+            return ($pass === $userdata['clear']);
         }
     }