diff --git a/projects/dac_fmc_ebz/vcu118/system_top.v b/projects/dac_fmc_ebz/vcu118/system_top.v
index ca2dd5c38..a88a09b0c 100755
--- a/projects/dac_fmc_ebz/vcu118/system_top.v
+++ b/projects/dac_fmc_ebz/vcu118/system_top.v
@@ -36,6 +36,7 @@
 `timescale 1ns/100ps
 
 module system_top #(
+    parameter NUM_LINKS = 2,
     parameter DEVICE_CODE = 0
   ) (
   
diff --git a/projects/dac_fmc_ebz/zc706/system_top.v b/projects/dac_fmc_ebz/zc706/system_top.v
index 4f0e7ec01..42a2a5d1e 100644
--- a/projects/dac_fmc_ebz/zc706/system_top.v
+++ b/projects/dac_fmc_ebz/zc706/system_top.v
@@ -36,6 +36,7 @@
 `timescale 1ns/100ps
 
 module system_top #(
+    parameter NUM_LINKS = 2,
     parameter DEVICE_CODE = 0
   ) (
 
diff --git a/projects/dac_fmc_ebz/zcu102/system_top.v b/projects/dac_fmc_ebz/zcu102/system_top.v
index 4c8946c74..3233fc6e6 100644
--- a/projects/dac_fmc_ebz/zcu102/system_top.v
+++ b/projects/dac_fmc_ebz/zcu102/system_top.v
@@ -80,6 +80,7 @@ tx_sysref_p   SYSREF2_P       G06  FMC_HPC0_LA00_CC_P        Y4     IO_L13P_T2L_
 */
 
 module system_top #(
+    parameter NUM_LINKS = 2,
     parameter DEVICE_CODE = 0
   ) (