diff --git a/openhands/runtime/builder/docker.py b/openhands/runtime/builder/docker.py
index 69ccb0e035dc..1b3426857626 100644
--- a/openhands/runtime/builder/docker.py
+++ b/openhands/runtime/builder/docker.py
@@ -132,7 +132,7 @@ def build(
         buildx_cmd.append(path)  # must be last!
 
         self.rolling_logger.start(
-            f'================ {buildx_cmd[0].upper()} BUILD STARTED ================'
+            f'================ {buildx_cmd[0].upper()} BUILD STARTED (may take a ~3 minutes) ================'
         )
 
         try: