diff --git a/tools/binman/entry.py b/tools/binman/entry.py
index 70222718ea..5e66aa4fa5 100644
--- a/tools/binman/entry.py
+++ b/tools/binman/entry.py
@@ -95,7 +95,7 @@ class Entry(object):
         self.pad_after = 0
         self.offset_unset = False
         self.image_pos = None
-        self._expand_size = False
+        self.expand_size = False
         self.compress = 'none'
         self.missing = False
         self.external = False