diff --git a/library/think/Route.php b/library/think/Route.php
index 2f7cb64d..7fbe9d12 100644
--- a/library/think/Route.php
+++ b/library/think/Route.php
@@ -1139,7 +1139,7 @@ class Route
                     return false;
                 }
                 $var[$name] = isset($m1[$key]) ? $m1[$key] : '';
-            } elseif (0 !== strcasecmp($val, $m1[$key])) {
+            } elseif (!isset($m1[$key]) || 0 !== strcasecmp($val, $m1[$key])) {
                 return false;
             }
         }