diff --git a/src/osgTerrain/DisplacementMappingTechnique.cpp b/src/osgTerrain/DisplacementMappingTechnique.cpp
index a037bbbee..292850160 100644
--- a/src/osgTerrain/DisplacementMappingTechnique.cpp
+++ b/src/osgTerrain/DisplacementMappingTechnique.cpp
@@ -35,13 +35,11 @@ DisplacementMappingTechnique::~DisplacementMappingTechnique()
 {
 }
 
-void DisplacementMappingTechnique::init(int dirtyMask, bool assumeMultiThreaded)
+void DisplacementMappingTechnique::init(int /*dirtyMask*/, bool /*assumeMultiThreaded*/)
 {
     if (!_terrainTile) return;
     if (!_terrainTile->getTerrain()) return;
 
-    //OSG_NOTICE<<"DisplacementMappingTechnique::init("<<dirtyMask<<", "<<assumeMultiThreaded<<")"<<std::endl;
-
     GeometryPool* geometryPool = _terrainTile->getTerrain()->getGeometryPool();
     _transform = geometryPool->getTileSubgraph(_terrainTile);
 
diff --git a/src/osgTerrain/GeometryPool.cpp b/src/osgTerrain/GeometryPool.cpp
index b0e237913..d03ad3e30 100644
--- a/src/osgTerrain/GeometryPool.cpp
+++ b/src/osgTerrain/GeometryPool.cpp
@@ -812,7 +812,7 @@ void GeometryPool::applyLayers(osgTerrain::TerrainTile* tile, osg::StateSet* sta
     }
 }
 
-osg::StateSet* GeometryPool::getRootStateSetForTerrain(Terrain* terrain)
+osg::StateSet* GeometryPool::getRootStateSetForTerrain(Terrain* /*terrain*/)
 {
     //OSG_NOTICE<<"getRootStateSetForTerrain("<<terrain<<")"<<std::endl;
     return _rootStateSet.get();