diff --git a/lib/libc/stdio/fgetwln.c b/lib/libc/stdio/fgetwln.c
index daef9b3aa784..84394960363c 100644
--- a/lib/libc/stdio/fgetwln.c
+++ b/lib/libc/stdio/fgetwln.c
@@ -40,7 +40,7 @@ __FBSDID("$FreeBSD$");
 #include "local.h"
 #include "xlocale_private.h"
 
-wchar_t *fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale);
+wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t);
 
 wchar_t *
 fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale)