diff --git a/src/cpp/flann/algorithms/kdtree_single_index.h b/src/cpp/flann/algorithms/kdtree_single_index.h
index 903ddb4bc87709f9be9616b66209dc373a132c3f..fa53800c9261027a61116b7d1fe40bacfa7a28d1 100644
--- a/src/cpp/flann/algorithms/kdtree_single_index.h
+++ b/src/cpp/flann/algorithms/kdtree_single_index.h
@@ -205,6 +205,7 @@ public:
 	~KDTreeSingleIndex()
 	{
 		delete[] vind;
+        if (reorder_) data.free();
 	}
 
 	/**
@@ -216,6 +217,7 @@ public:
 		root_node = divideTree(0, size_, root_bbox ); 	// construct the tree
         
         if (reorder_) {
+            data.free();
             data = flann::Matrix<ElementType>(new ElementType[size_*dim], size_, dim);
             for (size_t i=0;i<size_;++i) {
                 for (size_t j=0;j<dim;++j) {