diff --git a/include/grpc++/impl/codegen/call.h b/include/grpc++/impl/codegen/call.h
index d342a3a25a9..c0753882661 100644
--- a/include/grpc++/impl/codegen/call.h
+++ b/include/grpc++/impl/codegen/call.h
@@ -544,7 +544,7 @@ class CallOpSet : public CallOpSetInterface,
     this->Op5::FinishOp(status, max_message_size_);
     this->Op6::FinishOp(status, max_message_size_);
     *tag = return_tag_;
-    SetCollection(nullptr); // drop the ref at this point
+    collection_.reset(); // drop the ref at this point
     return true;
   }