diff --git a/controllers/webhookController.go b/controllers/webhookController.go
index 4450759..0427a04 100644
--- a/controllers/webhookController.go
+++ b/controllers/webhookController.go
@@ -107,7 +107,10 @@ func OnPubStop(c *fiber.Ctx) error {
 		return err
 	}
 
-	transm := globals.Transmissions[p.StreamName]
+	transm, exists := globals.Transmissions[p.StreamName]
+	if !exists {
+		return fiber.ErrNotFound
+	}
 
 	now := time.Now()
 	duration := now.Sub(transm.StartTime)