diff --git a/testbench/ddr3.v b/testbench/ddr3.v
index 1b1077e..cf02caf 100644
--- a/testbench/ddr3.v
+++ b/testbench/ddr3.v
@@ -508,7 +508,7 @@ module ddr3 (
     always @(ras_n  ) ras_n_in   <= #(BUS_DELAY+FLY_BY_DELAY) ras_n;
     always @(cas_n  ) cas_n_in   <= #(BUS_DELAY+FLY_BY_DELAY) cas_n;
     always @(we_n   ) we_n_in    <= #(BUS_DELAY+FLY_BY_DELAY) we_n;
-    always @(dm_tdqs) dm_in      <= #(BUS_DELAY+FLY_BY_DELAY) dm_tdqs;
+    always @(dm_tdqs) dm_in      <= #(BUS_DELAY) dm_tdqs;
     always @(ba     ) ba_in      <= #(BUS_DELAY+FLY_BY_DELAY) ba;
     always @(addr   ) addr_in    <= #(BUS_DELAY+FLY_BY_DELAY) addr;
     always @(dq     ) dq_in      <= #(BUS_DELAY) dq;