diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index e5514157c..03fd2b4a6 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -785,12 +785,18 @@ class DivDispatch {
 
     /**
      * check whether sample has been loaded in memory.
-     * @param memory index.
+     * @param index index.
      * @param sample the sample in question.
      * @return whether it did.
      */
     virtual bool isSampleLoaded(int index, int sample);
     
+    /**
+     * get memory composition.
+     * @param index the memory index.
+     * @return a pointer to DivMemoryComposition, or NULL.
+     */
+    virtual const DivMemoryComposition* getMemCompo();
 
     /**
      * Render samples into sample memory.