diff --git a/RIGS/rigboard.py b/RIGS/rigboard.py
index f6565b3f..61ebc3a7 100644
--- a/RIGS/rigboard.py
+++ b/RIGS/rigboard.py
@@ -317,7 +317,7 @@ class EventAuthorisationRequest(generic.FormView, generic.detail.SingleObjectMix
         }
 
         msg = EmailMessage(
-            "N%05d | %s - Event Authorisation Request".format(self.object.pk, self.object.name),
+            "N%05d | %s - Event Authorisation Request" % (self.object.pk, self.object.name),
             get_template("RIGS/eventauthorisation_client_request.txt").render(context),
             to=[email],
         )