diff --git a/top/vfchd_ref_design/vfchd_wr_ref_top.vhd b/top/vfchd_ref_design/vfchd_wr_ref_top.vhd
index 4c2964988e9b35c89d9d6b527f6000315a227d64..e3d3ba6a467c2ea7cd9dc8a2455dba2a8837c396 100644
--- a/top/vfchd_ref_design/vfchd_wr_ref_top.vhd
+++ b/top/vfchd_ref_design/vfchd_wr_ref_top.vhd
@@ -398,7 +398,7 @@ begin  -- architecture top
 
   cmp_xwrc_board_vfchd : xwrc_board_vfchd
     generic map (
-      g_with_external_clock_input => TRUE,
+      g_with_external_clock_input => FALSE,
       g_dpram_initf               => "../../bin/wrpc/wrc_phy8.mif",
       g_fabric_iface              => ETHERBONE)
     port map (