diff --git a/lib/cpp/src/thrift/TProcessor.h b/lib/cpp/src/thrift/TProcessor.h
index d8f86c4..4a0604e 100644
--- a/lib/cpp/src/thrift/TProcessor.h
+++ b/lib/cpp/src/thrift/TProcessor.h
@@ -150,7 +150,7 @@
     return process(io, io, connectionContext);
   }
 
-  boost::shared_ptr<TProcessorEventHandler> getEventHandler() { return eventHandler_; }
+  boost::shared_ptr<TProcessorEventHandler> getEventHandler() const { return eventHandler_; }
 
   void setEventHandler(boost::shared_ptr<TProcessorEventHandler> eventHandler) {
     eventHandler_ = eventHandler;
diff --git a/lib/cpp/src/thrift/async/TAsyncProcessor.h b/lib/cpp/src/thrift/async/TAsyncProcessor.h
index ee305a2..01a34c4 100644
--- a/lib/cpp/src/thrift/async/TAsyncProcessor.h
+++ b/lib/cpp/src/thrift/async/TAsyncProcessor.h
@@ -47,7 +47,7 @@
     return process(_return, io, io);
   }
 
-  boost::shared_ptr<TProcessorEventHandler> getEventHandler() { return eventHandler_; }
+  boost::shared_ptr<TProcessorEventHandler> getEventHandler() const { return eventHandler_; }
 
   void setEventHandler(boost::shared_ptr<TProcessorEventHandler> eventHandler) {
     eventHandler_ = eventHandler;