diff --git a/src/osgPlugins/txp/TXPParser.h b/src/osgPlugins/txp/TXPParser.h
index e68f2f138..9aaf5a03d 100644
--- a/src/osgPlugins/txp/TXPParser.h
+++ b/src/osgPlugins/txp/TXPParser.h
@@ -239,6 +239,8 @@ public:
         return _layerGeode;
     }
     
+    inline unsigned int getNumLayerLavels() const { return _numLayerLevels; }
+    
     // default value to use when setting up textures.
     void setMaxAnisotropy(float anisotropy)
     {