diff --git a/openbr/plugins/imgproc/slidingwindow.cpp b/openbr/plugins/imgproc/slidingwindow.cpp
index b15b390..66591fc 100644
--- a/openbr/plugins/imgproc/slidingwindow.cpp
+++ b/openbr/plugins/imgproc/slidingwindow.cpp
@@ -29,7 +29,8 @@ namespace br
  * \brief Sliding Window Framework
  * \author Jordan Cheney
  */
-class SlidingWindowTransform : public UntrainableMetaTransform
+
+class SlidingWindowTransform : public MetaTransform
 {
     Q_OBJECT