diff --git a/lib/url.c b/lib/url.c
index 95eab6da1..3eec1ccad 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -2553,6 +2553,9 @@ static void fix_hostname(struct SessionHandle *data,
   (void)data; /* never used */
   (void)conn; /* never used */
 #endif
+#ifdef CURL_DISABLE_VERBOSE_STRINGS
+  (void)conn; /* never used */
+#endif
 }
 
 /*