1 files changed, 1 insertions, 1 deletions
diff --git a/lib/delegate.rb b/lib/delegate.rb
index 5fc0cafb4b..d0b732aa8d 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -137,7 +137,7 @@ class Delegator
         target.__send__(m, *args, &block)
       end
     rescue Exception
-      $@.delete_if{|s| %r"\A#{__FILE__}:\d+:in `method_missing'\z"o =~ s}
+      $@.delete_if{|s| %r"\A#{Regexp.quote(__FILE__)}:\d+:in `method_missing'\z"o =~ s}
       ::Kernel::raise
     end
   end