diff --git a/terraform/api_gateway.tf.json.template.py b/terraform/api_gateway.tf.json.template.py
index 675c1a24f..3ff1644b9 100644
--- a/terraform/api_gateway.tf.json.template.py
+++ b/terraform/api_gateway.tf.json.template.py
@@ -98,7 +98,6 @@ def for_domain(cls, domain):
     'error_responseType': '$context.error.responseType',
     'extendedRequestId': '$context.extendedRequestId',
     'httpMethod': '$context.httpMethod',
-    'identity_clientCert_validity_notAfter': '$context.identity.clientCert.validity.notAfter',
     'identity_sourceIp': '$context.identity.sourceIp',
     'identity_userAgent': '$context.identity.userAgent',
     'integration_error': '$context.integration.error',