diff --git a/lib/rfnoc/core/chdr_mgmt_pkt_handler.v b/lib/rfnoc/core/chdr_mgmt_pkt_handler.v
index f9c56a6..42b851f 100644
--- a/lib/rfnoc/core/chdr_mgmt_pkt_handler.v
+++ b/lib/rfnoc/core/chdr_mgmt_pkt_handler.v
@@ -181,7 +181,7 @@ module chdr_mgmt_pkt_handler #(
 
   generate 
     if (CHDR_W > 64)
-      assign m_mgmt_tdata[CHDR_W-1:CHDR_W-64] = 'h0;
+      assign m_mgmt_tdata[CHDR_W-1:64] = 'h0;
   endgenerate
 
   // ---------------------------------------------------