diff --git a/apps/rule-manager/app/db/DbRuleDraft.scala b/apps/rule-manager/app/db/DbRuleDraft.scala
index 07fe0c035..f723951c5 100644
--- a/apps/rule-manager/app/db/DbRuleDraft.scala
+++ b/apps/rule-manager/app/db/DbRuleDraft.scala
@@ -39,7 +39,7 @@ case class DbRuleDraft(
     id match {
       case None =>
         throw new Exception(
-          s"Attempted to make live rule for rule with externalId $externalId, but the rule did not have an id"
+          s"Attempted to make live rule for rule with externalId ${externalId}, but the rule did not have an id"
         )
       case Some(_) =>
         DbRuleLive(