diff --git a/frappe/api.py b/frappe/api.py
index 2ce490d68d..b61c535edd 100644
--- a/frappe/api.py
+++ b/frappe/api.py
@@ -81,7 +81,10 @@ def handle():
 					frappe.local.response.update({"data": doc})
 
 				if frappe.local.request.method=="PUT":
-					data = json.loads(frappe.local.form_dict.data)
+					if frappe.local.form_dict.data is None:
+						data = json.loads(frappe.local.request.get_data())
+					else:
+						data = json.loads(frappe.local.form_dict.data)
 					doc = frappe.get_doc(doctype, name)
 
 					if "flags" in data: