diff --git a/frappe/model/base_document.py b/frappe/model/base_document.py
index a50bf9fdaf..cbbe2b267e 100644
--- a/frappe/model/base_document.py
+++ b/frappe/model/base_document.py
@@ -275,7 +275,7 @@ class BaseDocument(object):
 		doc["doctype"] = self.doctype
 		for df in self.meta.get_table_fields():
 			children = self.get(df.fieldname) or []
-			doc[df.fieldname] = [d.as_dict(no_nulls=no_nulls) for d in children]
+			doc[df.fieldname] = [d.as_dict(convert_dates_to_str=convert_dates_to_str, no_nulls=no_nulls) for d in children]
 
 		if no_nulls:
 			for k in list(doc):