diff --git a/design/top.vhd b/design/top.vhd
index 811614e..2fe18c0 100644
--- a/design/top.vhd
+++ b/design/top.vhd
@@ -298,7 +298,7 @@ begin
 		if rst = '1' then
 			avl_reqEn <= '1';
 		elsif rising_edge(clk) then
-			if intercon_slave_i(INTERCON_ID_DDR3).STB = '1' then
+			if intercon_slave_i(INTERCON_ID_DDR3).STB = '1' and not intercon_slave_o(INTERCON_ID_DDR3).ACK= '1' then
 				avl_reqEn <= '0';
 			else
 				avl_reqEn <= '1';