1 files changed, 11 insertions, 1 deletions
diff --git a/lib/drb/drb.rb b/lib/drb/drb.rb
index 78cf482c86..472f5c8db0 100644
--- a/lib/drb/drb.rb
+++ b/lib/drb/drb.rb
@@ -1045,7 +1045,17 @@ module DRb
 
     undef :to_s
     undef :to_a if respond_to?(:to_a)
-    undef :respond_to?
+
+    def respond_to?(msg_id)
+      case msg_id
+      when :_dump
+        true
+      when :marshal_dump
+        false
+      else
+        method_missing(:respond_to?, msg_id)
+      end
+    end
 
     # Routes method calls to the referenced object.
     def method_missing(msg_id, *a, &b)