diff --git a/library/util_adcfifo/util_adcfifo_constr.xdc b/library/util_adcfifo/util_adcfifo_constr.xdc
index d0f3cfbaa..2e7ab2b1c 100644
--- a/library/util_adcfifo/util_adcfifo_constr.xdc
+++ b/library/util_adcfifo/util_adcfifo_constr.xdc
@@ -1,6 +1,8 @@
 
-set_clock_groups -asynchronous -group [get_clocks -of_objects [get_ports adc_clk]]
-set_clock_groups -asynchronous -group [get_clocks -of_objects [get_ports dma_clk]]
-
+set_property shreg_extract no [get_cells -hier -filter {name =~ *adc_xfer_req_m*}]
+set_property shreg_extract no [get_cells -hier -filter {name =~ *dma_waddr_rel_t*}]
 
+set_false_path -from [get_cells -hier -filter {name =~ *adc_waddr_rel_t_reg* && IS_SEQUENTIAL}] -to [get_cells -hier -filter {name =~ *dma_waddr_rel_t_m_reg[0]* && IS_SEQUENTIAL}]
+set_false_path -from [get_cells -hier -filter {name =~ *adc_waddr_rel_reg* && IS_SEQUENTIAL}]   -to [get_cells -hier -filter {name =~ *dma_waddr_rel_reg* && IS_SEQUENTIAL}]
+set_false_path -to [get_cells -hier -filter {name =~ *adc_xfer_req_m_reg[0]* && IS_SEQUENTIAL}]