diff --git a/src/app.rs b/src/app.rs
index 40f4360..33e9aa5 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -63,6 +63,7 @@ impl ProxyApp {
                         return Some(ipv4_address);
                     }
                 }
+                log::error!("DNS lookup: {} failed: not found", hostname);
             }
             Err(e) => {
                 log::error!("DNS lookup: {} failed: {}", hostname, e);