diff --git a/segmentation/include/pcl/segmentation/supervoxel_clustering.h b/segmentation/include/pcl/segmentation/supervoxel_clustering.h
index 05e6002..99e3a07 100644
--- a/segmentation/include/pcl/segmentation/supervoxel_clustering.h
+++ b/segmentation/include/pcl/segmentation/supervoxel_clustering.h
@@ -525,7 +525,7 @@ namespace pcl
       };
 
       //Make boost::ptr_list can access the private class SupervoxelHelper
-      friend void boost::checked_delete<> (const typename pcl::SupervoxelClustering<PointT>::SupervoxelHelper *);
+      //friend void boost::checked_delete<> (const typename pcl::SupervoxelClustering<PointT>::SupervoxelHelper *);
 
       typedef boost::ptr_list<SupervoxelHelper> HelperListT;
       HelperListT supervoxel_helpers_;
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 68cc438..8cfa1c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -416,6 +416,9 @@ endif()
 
 # Boost (required)
 include("${PCL_SOURCE_DIR}/cmake/pcl_find_boost.cmake")
+if (NOT APPLE)
+    add_definitions(-fext-numeric-literals)
+endif()
 
 ### ---[ Create the config.h file
 set(pcl_config_h_in "${CMAKE_CURRENT_SOURCE_DIR}/pcl_config.h.in")