diff --git a/library/jesd204/tb/axi_jesd204_rx_regmap_tb b/library/jesd204/tb/axi_jesd204_rx_regmap_tb
index 7ca030b90..d0f40132c 100755
--- a/library/jesd204/tb/axi_jesd204_rx_regmap_tb
+++ b/library/jesd204/tb/axi_jesd204_rx_regmap_tb
@@ -11,6 +11,7 @@ SOURCE+=" ../../common/up_clock_mon.v"
 SOURCE+=" ../../common/up_axi.v"
 SOURCE+=" ../../util_cdc/sync_bits.v"
 SOURCE+=" ../../util_cdc/sync_data.v"
+SOURCE+=" ../../util_cdc/sync_event.v"
 
 cd `dirname $0`
 source run_tb.sh