diff --git a/src/devices/emulator/biosemu.c b/src/devices/emulator/biosemu.c
index d6ad4e23a0..e38541edd3 100644
--- a/src/devices/emulator/biosemu.c
+++ b/src/devices/emulator/biosemu.c
@@ -122,6 +122,7 @@ void do_int(int num)
 	case 0x6D:
 		if (getIntVect(num) == 0x0000) {
 			printk_debug("un-inited int vector\n");
+			ret = 1;
 		}
 		if (getIntVect(num) == 0xFF065) {
 			//ret = int42_handler();