diff --git a/lib/emac/src/piso.vhd b/lib/emac/src/piso.vhd
index ef9c2f6..51152fa 100644
--- a/lib/emac/src/piso.vhd
+++ b/lib/emac/src/piso.vhd
@@ -67,7 +67,7 @@ begin
 	if rising_edge(clk) then
 		if rst = '1' then
 			din_vld_reg	<= '0';
-		elsif pre_fin = '1' and dout_en = '1' then
+		elsif (pre_fin = '1' and dout_en = '1') or din_vld_reg = '0' then
 			din_vld_reg	<= din_vld;
 		end if;
 	end if;