diff --git a/programs/cmm/lib/kolibri.h b/programs/cmm/lib/kolibri.h
index e61d559831..6ba83b4dfe 100644
--- a/programs/cmm/lib/kolibri.h
+++ b/programs/cmm/lib/kolibri.h
@@ -94,10 +94,9 @@ inline fastcall dword CheckEvent()
 	$int 0x40
 }
 
-inline dword WaitEventTimeout(dword time)
+inline dword WaitEventTimeout(EBX)
 {
 	EAX = 23;
-	EBX = time;
 	$int 0x40
 }