diff --git a/syn/vivado/taxi_sync_reset.tcl b/syn/vivado/taxi_sync_reset.tcl
index 4ece926..5c86fa2 100644
--- a/syn/vivado/taxi_sync_reset.tcl
+++ b/syn/vivado/taxi_sync_reset.tcl
@@ -12,7 +12,7 @@ foreach inst [get_cells -hier -filter {(ORIG_REF_NAME == taxi_sync_reset || REF_
     puts "Inserting timing constraints for taxi_sync_reset instance $inst"
 
     # reset synchronization
-    set reset_ffs [get_cells -quiet -hier -regexp ".*/sync_reg_reg\\\[\\d+\\\]" -filter "PARENT == $inst"]
+    set reset_ffs [get_cells -quiet -hier "sync_reg_reg[*]" -filter "PARENT == $inst"]
 
     set_property ASYNC_REG TRUE $reset_ffs
     set_false_path -to [get_pins -of_objects $reset_ffs -filter {IS_PRESET || IS_RESET}]