diff --git a/configuration/ampathforms/PrEP_Initial.json b/configuration/ampathforms/PrEP_Initial.json
index ba42cd2a..a7e58465 100644
--- a/configuration/ampathforms/PrEP_Initial.json
+++ b/configuration/ampathforms/PrEP_Initial.json
@@ -71,7 +71,7 @@
 					"validators": [
 						{
 						  "type": "js_expression",
-						  "failsWhenExpression": "doesNotMatchExpression('^\\\\\\d{10}$', uniquePatientNumber)",
+						  "failsWhenExpression": "doesNotMatchExpression('^\\\\\\d{10}$', pArtnersCcc)",
 						  "message": "Please provide the correct format for the UPN ie. mflCode+number eg.1190200062"
 						}
 					  ]