diff --git a/src/main/java/org/alfresco/model/RenditionModel.java b/src/main/java/org/alfresco/model/RenditionModel.java
index 5409db6a31..7115bae0cb 100644
--- a/src/main/java/org/alfresco/model/RenditionModel.java
+++ b/src/main/java/org/alfresco/model/RenditionModel.java
@@ -41,6 +41,12 @@ public interface RenditionModel
      */
     static final QName ASPECT_RENDITION2 = QName.createQName(NamespaceService.RENDITION_MODEL_1_0_URI, "rendition2");
 
+    /**
+     * Version number used to work out if a transform should replace the existing rendition, as transforms may be
+     * provided outr of order.
+     */
+    static final QName PROP_RENDITION_VERSION = QName.createQName(NamespaceService.RENDITION_MODEL_1_0_URI, "version");
+
     /**
      * @deprecated This rendition aspect will no longger be needed once the original RenditionService has been
      * replaced by RenditionService2 which additionally uses a rendition2 aspect to mark its renditions.