1 files changed, 2 insertions, 0 deletions
diff --git a/ruby/src/main/java/com/google/protobuf/jruby/RubyDescriptor.java b/ruby/src/main/java/com/google/protobuf/jruby/RubyDescriptor.java
index 51c50be8..dd9179b0 100644
--- a/ruby/src/main/java/com/google/protobuf/jruby/RubyDescriptor.java
+++ b/ruby/src/main/java/com/google/protobuf/jruby/RubyDescriptor.java
@@ -248,6 +248,8 @@ public class RubyDescriptor extends RubyObject {
         klass.setAllocator(allocator);
         klass.makeMetaClass(runtime.getObject().getMetaClass());
         klass.inherit(runtime.getObject());
+        RubyModule messageExts = runtime.getClassFromPath("Google::Protobuf::MessageExts");
+        klass.include(new IRubyObject[] {messageExts});
         klass.instance_variable_set(runtime.newString(Utils.DESCRIPTOR_INSTANCE_VAR), this);
         klass.defineAnnotatedMethods(RubyMessage.class);
         return klass;