diff --git a/include/osgpcl/outofcore_octree_reader.h b/include/osgpcl/outofcore_octree_reader.h
index 574b2a9..c98425e 100644
--- a/include/osgpcl/outofcore_octree_reader.h
+++ b/include/osgpcl/outofcore_octree_reader.h
@@ -153,6 +153,8 @@ namespace osgpcl
           const osg::Vec3d& getBBmin(){return bbmin_;}
           bool isLeaf(){return isLeaf_;}
           void setLeaf(bool enable){isLeaf_=enable;}
+          
+          void addCacheHint( const osgDB::Options::CacheHintOptions cho );
       };
 
   };
diff --git a/src/outofcore_octree_reader.cpp b/src/outofcore_octree_reader.cpp
index 4b916a3..c6e7159 100644
--- a/src/outofcore_octree_reader.cpp
+++ b/src/outofcore_octree_reader.cpp
@@ -199,6 +199,7 @@ namespace osgpcl
       isRoot_(true),depth_(0), max_depth_(0), depth_set_(false),
       bbmin_(0,0,0),bbmax_(0,0,0), isLeaf_(false)
   {
+    addCacheHint( osgDB::Options::CACHE_NODES );
   }
 
   OutofCoreOctreeReader::OutOfCoreOptions::OutOfCoreOptions (
@@ -206,6 +207,7 @@ namespace osgpcl
           isRoot_(true),depth_(0), max_depth_(0), depth_set_(false),
           bbmin_(0,0,0),bbmax_(0,0,0), isLeaf_(false)
   {
+    addCacheHint( osgDB::Options::CACHE_NODES );
   }
 
   OutofCoreOctreeReader::OutOfCoreOptions::OutOfCoreOptions (
@@ -213,6 +215,7 @@ namespace osgpcl
           CloudReaderOptions(factory, 1), isRoot_(true),depth_(0), max_depth_(0),
           depth_set_(false),  bbmin_(0,0,0),bbmax_(0,0,0), isLeaf_(false)
   {
+    addCacheHint( osgDB::Options::CACHE_NODES );
     this->init(octree_ );
   }
 
@@ -282,6 +285,8 @@ namespace osgpcl
     this->sampling_rate_ = options.sampling_rate_;
     this->isLeaf_ = options.isLeaf_;
     this->depth_set_ = options.depth_set_;
+    
+    this->setObjectCacheHint( options.getObjectCacheHint() );
   }
 
   void OutofCoreOctreeReader::OutOfCoreOptions::getBoundingBox (
@@ -290,6 +295,16 @@ namespace osgpcl
     bbmin = bbmin_;
     bbmax = bbmax_;
   }
+  
+    void OutofCoreOctreeReader::OutOfCoreOptions::addCacheHint (
+          const osgDB::Options::CacheHintOptions cho)
+  {
+      const osgDB::Options::CacheHintOptions cacheHint =
+          static_cast<osgDB::Options::CacheHintOptions>( getObjectCacheHint()
+                                                         | cho )
+      ;
+      setObjectCacheHint( cacheHint );
+  }
 
 }