diff --git a/.changeset/sparkly-regions-retire.md b/.changeset/sparkly-regions-retire.md
new file mode 100644
index 0000000000..ccf5b821e6
--- /dev/null
+++ b/.changeset/sparkly-regions-retire.md
@@ -0,0 +1,5 @@
+---
+"ivs-functions": patch
+---
+
+Add webinar's slug to parameters in PUT when a webinar ends
diff --git a/apps/ivs-functions/src/handlers/recordingEndedJsonHandler.ts b/apps/ivs-functions/src/handlers/recordingEndedJsonHandler.ts
index e55eb0fdd1..d967b8daea 100644
--- a/apps/ivs-functions/src/handlers/recordingEndedJsonHandler.ts
+++ b/apps/ivs-functions/src/handlers/recordingEndedJsonHandler.ts
@@ -85,6 +85,7 @@ export const recordingEndedS3EventHandler = async (event: S3Event) => {
       body: {
         data: {
           playerSrc: newPlayerSrc,
+          cs_uri_query: webinar.attributes.slug,
         },
       },
     });
diff --git a/apps/ivs-functions/src/types/strapiWebinars.ts b/apps/ivs-functions/src/types/strapiWebinars.ts
index f40a686b87..b004f7c562 100644
--- a/apps/ivs-functions/src/types/strapiWebinars.ts
+++ b/apps/ivs-functions/src/types/strapiWebinars.ts
@@ -2,6 +2,7 @@ export type StrapiWebinars = {
   readonly data: readonly {
     readonly id: string;
     readonly attributes: {
+      readonly slug: string;
       readonly startDatetime: string;
       readonly endDatetime: string;
     };