diff --git a/sys/boot/i386/libi386/biospnp.c b/sys/boot/i386/libi386/biospnp.c
index eee77aad557..66ef1a52f4d 100644
--- a/sys/boot/i386/libi386/biospnp.c
+++ b/sys/boot/i386/libi386/biospnp.c
@@ -263,7 +263,7 @@ biospnp_call(int func, const char *fmt, ...)
 	switch(*p) {
 
 	case 'w':
-	    i = va_arg(ap, u_int16_t);
+	    i = va_arg(ap, uint);
 	    *(u_int16_t *)argp = i;
 	    argp += sizeof(u_int16_t);
 	    break;