diff --git a/bitbake/lib/bb/data_smart.py b/bitbake/lib/bb/data_smart.py
index dbfcefb..f5f3b13 100644
--- a/bitbake/lib/bb/data_smart.py
+++ b/bitbake/lib/bb/data_smart.py
@@ -379,7 +379,7 @@ class DataSmart(MutableMapping):
 
         if local_var:
             for i in local_var:
-                if i == "_content":
+                if i.startswith("_"):
                     continue
                 flags[i] = local_var[i]