diff --git a/include/stdio.h b/include/stdio.h
index 4668af92cb27..a7e86a700df2 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: stdio.h,v 1.96 2015/03/24 07:44:52 wiz Exp $	*/
+/*	$NetBSD: stdio.h,v 1.97 2016/03/17 00:42:49 christos Exp $	*/
 
 /*-
  * Copyright (c) 1990, 1993
@@ -483,7 +483,7 @@ static __inline int __sputc(int _c, FILE *_p) {
 
 #define	__sfeof(p)	(((p)->_flags & __SEOF) != 0)
 #define	__sferror(p)	(((p)->_flags & __SERR) != 0)
-#define	__sclearerr(p)	((void)((p)->_flags &= ~(__SERR|__SEOF)))
+#define	__sclearerr(p)	((void)((p)->_flags &= (unsigned short)~(__SERR|__SEOF)))
 #define	__sfileno(p)	\
     ((p)->_file == -1 ? -1 : (int)(unsigned short)(p)->_file)