diff --git a/library/axi_dmac/axi_dmac_constr.xdc b/library/axi_dmac/axi_dmac_constr.xdc
index 003c75249..de21aa40d 100644
--- a/library/axi_dmac/axi_dmac_constr.xdc
+++ b/library/axi_dmac/axi_dmac_constr.xdc
@@ -1,3 +1,7 @@
 
-set_clock_groups -asynchronous -group [get_clocks -of_objects [get_ports -regexp .*clk$]]
+set_false_path -from [get_cells *in_count_gray* -hierarchical -filter {NAME =~ *i_request_arb* && PRIMITIVE_SUBGROUP == flop}] \
+  -to [get_cells *out_count_gray_m1* -hierarchical -filter {NAME =~ *i_request_arb* && PRIMITIVE_SUBGROUP == flop}]
+
+set_false_path -to [get_cells *out_m1* -hierarchical -filter {NAME =~ *i_request_arb* && PRIMITIVE_SUBGROUP == flop}]
+