diff --git a/src/lib.rs b/src/lib.rs
index e62a18e..60dc335 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -376,5 +376,5 @@ pub(crate) fn port(
             Some("ws") => Some(80),
             _ => None,
         })
-        .ok_or(tungstenite::Error::Url("Url scheme not supported".into()))
+        .ok_or_else(|| tungstenite::Error::Url("Url scheme not supported".into()))
 }