diff --git a/roles/matrix-bridge-appservice-discord/defaults/main.yml b/roles/matrix-bridge-appservice-discord/defaults/main.yml
index 61dc39bb..2832167c 100644
--- a/roles/matrix-bridge-appservice-discord/defaults/main.yml
+++ b/roles/matrix-bridge-appservice-discord/defaults/main.yml
@@ -69,7 +69,7 @@ matrix_appservice_discord_configuration_yaml: |
     disableJoinLeaveNotifications: false
   # Authentication configuration for the discord bot.
   auth:
-    clientID: {{ matrix_appservice_discord_client_id }}
+    clientID: {{ matrix_appservice_discord_client_id|string }}
     botToken: {{ matrix_appservice_discord_bot_token }}
   logging:
     # What level should the logger output to the console at.