diff --git a/src/mame/drivers/segas16b.c b/src/mame/drivers/segas16b.c
index 12efd7a1c96..095414fc48e 100644
--- a/src/mame/drivers/segas16b.c
+++ b/src/mame/drivers/segas16b.c
@@ -1776,10 +1776,9 @@ static WRITE16_HANDLER( sjryuko_custom_io_w )
 	{
 		case 0x0000/2:
 			if (((state->mj_last_val ^ data) & 4) && (data & 4))
-			{
 				state->mj_input_num = (state->mj_input_num + 1) % 6;
-				state->mj_last_val = data;
-			}
+
+			state->mj_last_val = data;
 			break;
 	}
 	standard_io_w(space, offset, data, mem_mask);