diff --git a/bitbake/lib/bb/data_smart.py b/bitbake/lib/bb/data_smart.py
index 7755f1afd8..e69f8d72df 100644
--- a/bitbake/lib/bb/data_smart.py
+++ b/bitbake/lib/bb/data_smart.py
@@ -780,7 +780,7 @@ class DataSmart(MutableMapping):
 
         data.overrides = None
         data.overridevars = copy.copy(self.overridevars)
-        data.overridedata = copy.copy(self.overridedata)
+        data.overridedata = copy.deepcopy(self.overridedata)
 
         return data