diff --git a/include/osg/PagedLOD b/include/osg/PagedLOD
index 3f2711e4f..a4d527fb8 100644
--- a/include/osg/PagedLOD
+++ b/include/osg/PagedLOD
@@ -70,6 +70,8 @@ class OSG_EXPORT PagedLOD : public LOD
             std::string                     _filename;
             float                           _priorityOffset;
             float                           _priorityScale;
+            double                          _minExpiryTime;
+            unsigned int                    _minExpiryFrames;
             double                          _timeStamp;
             unsigned int                    _frameNumber;
             unsigned int                    _frameNumberOfLastReleaseGLObjects;
@@ -91,6 +93,16 @@ class OSG_EXPORT PagedLOD : public LOD
         float getPriorityScale(unsigned int childNo) const { return _perRangeDataList[childNo]._priorityScale; }
         unsigned int getNumPriorityScales() const { return _perRangeDataList.size(); }
 
+        /** Sets the minimum amount of time, in seconds, that must pass without a child being traversed before it can be expired. */
+        void setMinimumExpiryTime(unsigned int childNo, double minTime) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._minExpiryTime=minTime; }
+        double getMinimumExpiryTime(unsigned int childNo) const { return _perRangeDataList[childNo]._minExpiryTime; }
+        unsigned int getNumMinimumExpiryTimes() const { return _perRangeDataList.size(); }
+
+         /** Sets the minimum number of frames that must be rendered without a child being traversed before it can be expired. */
+        void setMinimumExpiryFrames(unsigned int childNo, unsigned int minFrames) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._minExpiryFrames=minFrames; }
+        unsigned int getMinimumExpiryFrames(unsigned int childNo) const { return _perRangeDataList[childNo]._minExpiryFrames; }
+        unsigned int getNumMinimumExpiryFrames() const { return _perRangeDataList.size(); }
+
 
         void setTimeStamp(unsigned int childNo, double timeStamp) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._timeStamp=timeStamp; }
         double getTimeStamp(unsigned int childNo) const { return _perRangeDataList[childNo]._timeStamp; }
diff --git a/src/osg/PagedLOD.cpp b/src/osg/PagedLOD.cpp
index 306dddca9..f52daa239 100644
--- a/src/osg/PagedLOD.cpp
+++ b/src/osg/PagedLOD.cpp
@@ -22,6 +22,8 @@ using namespace osg;
 PagedLOD::PerRangeData::PerRangeData():
     _priorityOffset(0.0f),
     _priorityScale(1.0f),
+    _minExpiryTime(0.0),
+    _minExpiryFrames(0),
     _timeStamp(0.0f),
     _frameNumber(0),
     _frameNumberOfLastReleaseGLObjects(0) {}
@@ -30,6 +32,8 @@ PagedLOD::PerRangeData::PerRangeData(const PerRangeData& prd):
     _filename(prd._filename),
     _priorityOffset(prd._priorityOffset),
     _priorityScale(prd._priorityScale),
+    _minExpiryTime(prd._minExpiryTime),
+    _minExpiryFrames(prd._minExpiryFrames),
     _timeStamp(prd._timeStamp),
     _frameNumber(prd._frameNumber),
     _frameNumberOfLastReleaseGLObjects(prd._frameNumberOfLastReleaseGLObjects),
@@ -45,6 +49,8 @@ PagedLOD::PerRangeData& PagedLOD::PerRangeData::operator = (const PerRangeData&
     _frameNumber = prd._frameNumber;
     _frameNumberOfLastReleaseGLObjects = prd._frameNumberOfLastReleaseGLObjects;
     _databaseRequest = prd._databaseRequest;
+    _minExpiryTime = prd._minExpiryTime;
+    _minExpiryFrames = prd._minExpiryFrames;
     return *this;
 }
 
@@ -290,8 +296,8 @@ bool PagedLOD::removeExpiredChildren(double expiryTime, unsigned int expiryFrame
     {
         unsigned cindex = _children.size() - 1;
         if (!_perRangeDataList[cindex]._filename.empty() &&
-            _perRangeDataList[cindex]._timeStamp<expiryTime &&
-            _perRangeDataList[cindex]._frameNumber<expiryFrame)
+            _perRangeDataList[cindex]._timeStamp + _perRangeDataList[cindex]._minExpiryTime < expiryTime &&
+            _perRangeDataList[cindex]._frameNumber + _perRangeDataList[cindex]._minExpiryFrames < expiryFrame)
         {            
             osg::Node* nodeToRemove = _children[cindex].get();
             removedChildren.push_back(nodeToRemove);