diff --git a/src/config.rs b/src/config.rs
index 0fa46aa..1d1026b 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -161,6 +161,9 @@ pub fn parse_opts(globals: &mut Globals) {
     #[cfg(feature = "tls")]
     {
         globals.tls_cert_path = matches.value_of("tls_cert_key_path").map(PathBuf::from);
-        globals.tls_cert_key_path = matches.value_of("tls_cert_key_path").map(PathBuf::from);
+        globals.tls_cert_key_path = matches
+            .value_of("tls_cert_key_path")
+            .map(PathBuf::from)
+            .or_else(|| globals.tls_cert_path.clone());
     }
 }