diff --git a/libc/upstream-openbsd/lib/libc/stdio/fvwrite.c b/libc/upstream-openbsd/lib/libc/stdio/fvwrite.c
index ba58f9d..d83de88 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/fvwrite.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/fvwrite.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fvwrite.c,v 1.20 2017/03/17 16:06:33 millert Exp $ */
+/*	$OpenBSD: fvwrite.c,v 1.21 2023/10/06 16:41:02 millert Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -34,7 +34,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
 #include <unistd.h>
 #include "local.h"
 #include "fvwrite.h"
@@ -58,10 +57,8 @@
 	if ((len = uio->uio_resid) == 0)
 		return (0);
 	/* make sure we can write */
-	if (cantwrite(fp)) {
-		errno = EBADF;
+	if (cantwrite(fp))
 		return (EOF);
-	}
 
 #define	MIN(a, b) ((a) < (b) ? (a) : (b))
 #define	COPY(n)	  (void)memcpy(fp->_p, p, n)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/wbuf.c b/libc/upstream-openbsd/lib/libc/stdio/wbuf.c
index 2d07750..edb6a50 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/wbuf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/wbuf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wbuf.c,v 1.13 2015/08/31 02:53:57 guenther Exp $ */
+/*	$OpenBSD: wbuf.c,v 1.14 2023/10/06 16:41:02 millert Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -32,7 +32,6 @@
  */
 
 #include <stdio.h>
-#include <errno.h>
 #include "local.h"
 
 /*
@@ -54,10 +53,8 @@
 	 * calls might wrap _w from negative to positive.
 	 */
 	fp->_w = fp->_lbfsize;
-	if (cantwrite(fp)) {
-		errno = EBADF;
+	if (cantwrite(fp))
 		return (EOF);
-	}
 	c = (unsigned char)c;
 
 	/*
diff --git a/libc/upstream-openbsd/lib/libc/stdio/wsetup.c b/libc/upstream-openbsd/lib/libc/stdio/wsetup.c
index 0834223..842036b 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/wsetup.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/wsetup.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: wsetup.c,v 1.7 2005/08/08 08:05:36 espie Exp $ */
+/*	$OpenBSD: wsetup.c,v 1.8 2023/10/06 16:41:02 millert Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -31,6 +31,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "local.h"
@@ -38,7 +39,7 @@
 /*
  * Various output routines call wsetup to be sure it is safe to write,
  * because either _flags does not include __SWR, or _buf is NULL.
- * _wsetup returns 0 if OK to write, nonzero otherwise.
+ * __swsetup returns 0 if OK to write, nonzero otherwise, setting errno.
  */
 int
 __swsetup(FILE *fp)
@@ -51,8 +52,11 @@
 	 * If we are not writing, we had better be reading and writing.
 	 */
 	if ((fp->_flags & __SWR) == 0) {
-		if ((fp->_flags & __SRW) == 0)
+		if ((fp->_flags & __SRW) == 0) {
+			errno = EBADF;
+			fp->_flags |= __SERR;
 			return (EOF);
+		}
 		if (fp->_flags & __SRD) {
 			/* clobber any ungetc data */
 			if (HASUB(fp))
@@ -68,8 +72,11 @@
 	 * Make a buffer if necessary, then set _w.
 	 */
 	if (fp->_bf._base == NULL) {
-		if ((fp->_flags & (__SSTR | __SALC)) == __SSTR)
+		if ((fp->_flags & (__SSTR | __SALC)) == __SSTR) {
+			errno = EINVAL;
+			fp->_flags |= __SERR;
 			return (EOF);
+		}
 		__smakebuf(fp);
 	}
 	if (fp->_flags & __SLBF) {