diff --git a/erpnext/manufacturing/doctype/workstation/workstation.py b/erpnext/manufacturing/doctype/workstation/workstation.py
index d679b94deb..00f7ee644b 100644
--- a/erpnext/manufacturing/doctype/workstation/workstation.py
+++ b/erpnext/manufacturing/doctype/workstation/workstation.py
@@ -32,7 +32,7 @@ class Workstation(Document):
 
 	def validate_overlap_for_operation_timings(self):
 		for d in self.get("working_hours"):
-			existing = frappe.db.sql_list("""select idx from `tabWorkstation Operation Hours`
+			existing = frappe.db.sql_list("""select idx from `tabWorkstation Working Hour`
 				where parent = %s and name != %s
 					and (
 						(start_time between %s and %s) or
diff --git a/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json b/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
index 2afc2e7f37..a513cdee8f 100644
--- a/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
+++ b/erpnext/manufacturing/doctype/workstation_working_hour/workstation_working_hour.json
@@ -115,7 +115,7 @@
  "is_submittable": 0, 
  "issingle": 0, 
  "istable": 1, 
- "modified": "2014-12-24 14:46:40.678236", 
+ "modified": "2015-02-11 14:55:55.650726", 
  "modified_by": "Administrator", 
  "module": "Manufacturing", 
  "name": "Workstation Working Hour",