diff --git a/projects/ad_fmclidar1_ebz/zcu102/system_constr.xdc b/projects/ad_fmclidar1_ebz/zcu102/system_constr.xdc
index 07c4215b5..0832a9c4c 100644
--- a/projects/ad_fmclidar1_ebz/zcu102/system_constr.xdc
+++ b/projects/ad_fmclidar1_ebz/zcu102/system_constr.xdc
@@ -98,9 +98,8 @@ set_property  -dict {PACKAGE_PIN  W7  IOSTANDARD LVCMOS18} [get_ports afe_adc_sd
 create_clock -period 4.000 -name rx_device_clk [get_ports rx_device_clk_p]
 create_clock -period 4.000 -name rx_ref_clk [get_ports rx_ref_clk_p]
 
-# SYSREF is in phase with the device clock
+# SYSREF is edge-aligned rising edge source synchronous input
 
-set_input_delay -clock [get_clocks rx_device_clk] -rise -max 0.200 [get_ports -regexp -filter { NAME =~  ".*sysref.*" && DIRECTION == "IN" }]
-set_input_delay -clock [get_clocks rx_device_clk] -rise -min -0.200 [get_ports -regexp -filter { NAME =~  ".*sysref.*" && DIRECTION == "IN" }]
-set_property IOBDELAY NONE [get_cells -hierarchical -regexp -filter { NAME =~ ".*sysref_r_reg"}]
+set_input_delay -clock [get_clocks rx_device_clk] [get_property PERIOD [get_clocks rx_device_clk]] \
+                [get_ports -regexp -filter { NAME =~  ".*sysref.*" && DIRECTION == "IN" }]