diff --git a/lib/libc/locale/wcsftime.c b/lib/libc/locale/wcsftime.c
index 22eb389e64ad..a546dc646a60 100644
--- a/lib/libc/locale/wcsftime.c
+++ b/lib/libc/locale/wcsftime.c
@@ -52,7 +52,8 @@ wcsftime(wchar_t * __restrict wcs, size_t maxsize,
 {
 	static const mbstate_t initial;
 	mbstate_t mbs;
-	char *dst, *dstp, *sformat;
+	char *dst, *sformat;
+	const char *dstp;
 	const wchar_t *formatp;
 	size_t n, sflen;
 	int sverrno;
@@ -90,7 +91,7 @@ wcsftime(wchar_t * __restrict wcs, size_t maxsize,
 		goto error;
 	dstp = dst;
 	mbs = initial;
-	n = mbsrtowcs(wcs, (const char **)&dstp, maxsize, &mbs);
+	n = mbsrtowcs(wcs, &dstp, maxsize, &mbs);
 	if (n == (size_t)-2 || n == (size_t)-1 || dstp != NULL)
 		goto error;