diff --git a/frappe/core/doctype/communication/communication.json b/frappe/core/doctype/communication/communication.json
index 8cd2c7c00f..4fab1d0e52 100644
--- a/frappe/core/doctype/communication/communication.json
+++ b/frappe/core/doctype/communication/communication.json
@@ -900,7 +900,7 @@
  "issingle": 0,
  "istable": 0,
  "max_attachments": 0,
- "modified": "2016-02-02 06:39:17.516884",
+ "modified": "2016-02-13 06:39:17.516884",
  "modified_by": "Administrator",
  "module": "Core",
  "name": "Communication",
diff --git a/frappe/core/doctype/communication/communication.py b/frappe/core/doctype/communication/communication.py
index 35ab4d5a0c..9c676ecb76 100644
--- a/frappe/core/doctype/communication/communication.py
+++ b/frappe/core/doctype/communication/communication.py
@@ -164,6 +164,7 @@ class Communication(Document):
 def on_doctype_update():
 	"""Add index in `tabCommunication` for `(reference_doctype, reference_name)`"""
 	frappe.db.add_index("Communication", ["reference_doctype", "reference_name"])
+	frappe.db.add_index("Communication", ["timeline_doctype", "timeline_name"])
 
 def has_permission(doc, ptype, user):
 	if ptype=="read" and doc.reference_doctype and doc.reference_name: