diff --git a/test/cfg/posix.c b/test/cfg/posix.c
index f5a79b346..0557c2dc1 100644
--- a/test/cfg/posix.c
+++ b/test/cfg/posix.c
@@ -48,7 +48,7 @@ int nullPointer_wcsnlen(const wchar_t *s, size_t n)
     return wcsnlen(s, n);
 }
 
-size_t bufferAccessOutOfBounds_wcsnlen(const wchar_t *s, size_t maxlen)
+size_t bufferAccessOutOfBounds_wcsnlen(void) // #10997
 {
     wchar_t buf[2]={L'4',L'2'};
     size_t len = wcsnlen(buf,2);