diff --git a/src/video/ataricommon/SDL_ikbdinterrupt.S b/src/video/ataricommon/SDL_ikbdinterrupt.S
index b8b337d94..2d06b670a 100644
--- a/src/video/ataricommon/SDL_ikbdinterrupt.S
+++ b/src/video/ataricommon/SDL_ikbdinterrupt.S
@@ -143,7 +143,7 @@ ikbd_finbuffer:
 ikbd:
 	| Check if source is IKBD or MIDI
 	btst	#0,0xfffffc04.w
-	beqs	ikbd_oldmidi
+	bnes	ikbd_oldmidi
 
 	moveml	d0-d1/a0,sp@-
 	moveb	0xfffffc02:w,d0
@@ -204,7 +204,7 @@ ikbd_mousex:
 
 	| Check if source is IKBD or MIDI
 	btst	#0,0xfffffc04.w
-	beqs	ikbd_oldmidi
+	bnes	ikbd_oldmidi
 
 	movew	d0,sp@-
 
@@ -223,7 +223,7 @@ ikbd_mousey:
 
 	| Check if source is IKBD or MIDI
 	btst	#0,0xfffffc04.w
-	beqs	ikbd_oldmidi
+	bnes	ikbd_oldmidi
 
 	movew	d0,sp@-
 
@@ -242,7 +242,7 @@ ikbd_joystick:
 
 	| Check if source is IKBD or MIDI
 	btst	#0,0xfffffc04.w
-	beqs	ikbd_oldmidi
+	bnes	ikbd_oldmidi
 
 	moveb	0xfffffc02:w,_SDL_AtariIkbd_joystick+1