diff --git a/library/jesd204/jesd204_rx/jesd204_rx_constr.sdc b/library/jesd204/jesd204_rx/jesd204_rx_constr.sdc
index 76f0c51e0..e3e8ea89c 100644
--- a/library/jesd204/jesd204_rx/jesd204_rx_constr.sdc
+++ b/library/jesd204/jesd204_rx/jesd204_rx_constr.sdc
@@ -44,4 +44,4 @@
 
 # SYNC~ is a asynchronous interface
 set_false_path \
-  -from [get_registers *|jesd204_rx_ctrl:i_rx_ctrl|sync_n]
+  -from [get_registers *|jesd204_rx_ctrl:i_rx_ctrl|sync_n[0]]