diff --git a/siso.py b/siso.py
index c9ca2b8f5c..d4e6c924c0 100644
--- a/siso.py
+++ b/siso.py
@@ -113,6 +113,8 @@ def main(args):
         for siso_path in siso_paths:
             if siso_path and os.path.isfile(siso_path):
                 return subprocess.call([siso_path] + args[1:], env=env)
+    if siso_override_path:
+        return subprocess.call([siso_override_path] + args[1:])
 
     print(
         'depot_tools/siso.py: Could not find .sisoenv under build/config/siso '