diff --git a/actions/block.php b/actions/block.php
index 8956b79ba5..fb553da6e9 100644
--- a/actions/block.php
+++ b/actions/block.php
@@ -159,7 +159,7 @@ class BlockAction extends Action {
             if ($k == 'returnto-action') {
                 $action = $v;
             } else if (substr($k, 0, 9) == 'returnto-') {
-                $args[$k] = substr($k, 9);
+                $args[substr($k, 9)] = $v;
             }
         }