diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
index aed13e1..b3ea745 100644
--- a/include/rdma/rdmavt_qp.h
+++ b/include/rdma/rdmavt_qp.h
@@ -225,6 +225,8 @@
 	};
 };
 
+#define	RC_QP_SCALING_INTERVAL	5
+
 /*
  * Variables prefixed with s_ are for the requester (sender).
  * Variables prefixed with r_ are for the responder (receiver).