diff --git a/tomotwin/modules/tools/embedding_mask.py b/tomotwin/modules/tools/embedding_mask.py
index a353748..2dfc122 100644
--- a/tomotwin/modules/tools/embedding_mask.py
+++ b/tomotwin/modules/tools/embedding_mask.py
@@ -140,7 +140,7 @@ def create_parser(self, parentparser: ArgumentParser) -> ArgumentParser:
             "-p",
             "--padding",
             type=bool,
-            default=True,
+            default=False,
             help="Add padding of half box size to the tomogram so that it is all included in the mask",
         )