diff --git a/packages/scout-agent/lib/slack.ts b/packages/scout-agent/lib/slack.ts
index 02a8ce2f..e9c0c7cc 100644
--- a/packages/scout-agent/lib/slack.ts
+++ b/packages/scout-agent/lib/slack.ts
@@ -82,6 +82,7 @@ const handleSlackEvent = async ({
           ext_shared_channel: metadata.channel?.is_ext_shared ?? false,
           type: "slack",
           channel_name: metadata.channel?.name ?? "",
+          user_id: metadata.user?.id ?? "",
         } satisfies SlackMessageMetadata,
       },
     ]);
diff --git a/packages/scout-agent/lib/types.ts b/packages/scout-agent/lib/types.ts
index e2ec1ada..57feb8c3 100644
--- a/packages/scout-agent/lib/types.ts
+++ b/packages/scout-agent/lib/types.ts
@@ -5,6 +5,7 @@ export interface SlackMessageMetadata {
   shared_channel: boolean;
   ext_shared_channel: boolean;
   channel_name: string;
+  user_id: string;
 }
 
 export type Message<