diff --git a/src/support/ios.c b/src/support/ios.c
index 360e29e603968..f8619ea834051 100644
--- a/src/support/ios.c
+++ b/src/support/ios.c
@@ -566,7 +566,7 @@ int ios_trunc(ios_t *s, size_t size)
 #if !defined(_OS_WINDOWS_)
         if (ftruncate(s->fd, size) == 0)
 #else
-        if (_chsize(s->fd, size) == 0)
+        if (_chsize_s(s->fd, size) == 0)
 #endif
             return 0;
     }