diff --git a/library/util_wfifo/util_wfifo_constr.xdc b/library/util_wfifo/util_wfifo_constr.xdc
index e4414d27c..26f3addde 100644
--- a/library/util_wfifo/util_wfifo_constr.xdc
+++ b/library/util_wfifo/util_wfifo_constr.xdc
@@ -1,4 +1,8 @@
 
+set_property SHREG_EXTRACT NO [get_cells -hier *din_ovf_m*]
+set_property SHREG_EXTRACT NO [get_cells -hier *dout_waddr_rel_t_m*]
+set_property SHREG_EXTRACT NO [get_cells -hier *dout_enable_m*]
+
 set_false_path -from [get_cells -hier *dout_ovf_int* -filter {primitive_subgroup == flop}] \
   -to [get_cells -hier *din_ovf_m* -filter {primitive_subgroup == flop}]
 set_false_path -from [get_cells -hier *din_waddr_rel_t* -filter {primitive_subgroup == flop}] \