diff --git a/cores/c64/rtl/t65/T65.vhd b/cores/c64/rtl/t65/T65.vhd
index 6aa472a..90bf886 100755
--- a/cores/c64/rtl/t65/T65.vhd
+++ b/cores/c64/rtl/t65/T65.vhd
@@ -511,8 +511,8 @@ begin
       DL <= (others => '0');
     elsif Clk'event and Clk = '1' then
       if (Enable = '1') then
-        NMI_entered <= '0';
         if (really_rdy = '1') then
+          NMI_entered <= '0';
           BusA_r <= BusA;
           BusB <= DI;