--- src/libc/go32/dpmiexcp.c
+++ src/libc/go32/dpmiexcp.c
@@ -197,7 +197,7 @@
   
   /* check video mode for original here and reset (not if PC98) */
   if(ScreenPrimary != 0xa0000 && _farpeekb(_dos_ds, 0x449) != old_video_mode) {
-    asm volatile ("pusha;movzbl _old_video_mode,%eax; int $0x10;popa;nop");
+    asm volatile ("pusha; int $0x10; popa; nop" : : "a" ((__UINT32_TYPE__)old_video_mode));
   }
   en = (signum >= EXCEPTION_COUNT) ? 0 : 
   exception_names[signum];