diff --git a/app/render/backend/renderworker.h b/app/render/backend/renderworker.h
index a8848c643..3f5af3f9d 100644
--- a/app/render/backend/renderworker.h
+++ b/app/render/backend/renderworker.h
@@ -84,18 +84,6 @@ public:
     preview_job_time_ = job_time;
   }
 
-  /**
-   * @brief Return a unique ID for the image generated at this time
-   *
-   * This hash should always be unique to this image and can therefore be used to match existing
-   * cached frames.
-   *
-   * @return
-   *
-   * SHA-1 hash or empty QByteArray if no viewer node is set.
-   */
-  void Hash(RenderTicketPtr ticket, ViewerOutput *viewer, const QList<rational>& times);
-
   /**
    * @brief Render the frame at this time
    *