diff --git a/builder/main.py b/builder/main.py
index 978c790..c6ad3a7 100644
--- a/builder/main.py
+++ b/builder/main.py
@@ -198,7 +198,10 @@ def _rpi_sysgpio(path, value):
     upload_actions = [env.VerboseAction("$UPLOADCMD", "Uploading $SOURCE")]
 
 elif upload_protocol == "custom":
-    upload_actions = [env.VerboseAction("$UPLOADCMD", "Uploading $SOURCE")]
+    upload_actions = [
+        env.VerboseAction(BeforeUpload, "Looking for upload port..."),
+        env.VerboseAction("$UPLOADCMD", "Uploading $SOURCE"),
+    ]
 
 else:
     env.Replace(