diff --git a/compiler/cpp/src/thrift/generate/t_csharp_generator.cc b/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
index 73ee030..bd6331d 100644
--- a/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
+++ b/compiler/cpp/src/thrift/generate/t_csharp_generator.cc
@@ -2049,7 +2049,7 @@
   string extends_processor = "";
   if (tservice->get_extends() != NULL) {
     extends = type_name(tservice->get_extends());
-    extends_processor = extends + ".Processor, ";
+    extends_processor = extends + ".AsyncProcessor, ";
   }
 
   indent(f_service_) << "public class AsyncProcessor : " << extends_processor << "TAsyncProcessor {" << endl;