diff --git a/include/osgTerrain/GeometryPool b/include/osgTerrain/GeometryPool
index 06fec359a..026cc01c5 100644
--- a/include/osgTerrain/GeometryPool
+++ b/include/osgTerrain/GeometryPool
@@ -66,7 +66,7 @@ class OSGTERRAIN_EXPORT SharedGeometry : public osg::Drawable
         const VertexToHeightFieldMapping& getVertexToHeightFieldMapping() const { return _vertexToHeightFieldMapping; }
 
 
-        osg::VertexArrayState* createVertexArrayStateImplemenation(osg::RenderInfo& renderInfo) const;
+        osg::VertexArrayState* createVertexArrayStateImplementation(osg::RenderInfo& renderInfo) const;
 
         void compileGLObjects(osg::RenderInfo& renderInfo) const;
 
diff --git a/src/osgTerrain/GeometryPool.cpp b/src/osgTerrain/GeometryPool.cpp
index 760579440..45b00fef9 100644
--- a/src/osgTerrain/GeometryPool.cpp
+++ b/src/osgTerrain/GeometryPool.cpp
@@ -796,7 +796,7 @@ SharedGeometry::~SharedGeometry()
 {
 }
 
-osg::VertexArrayState* SharedGeometry::createVertexArrayStateImplemenation(osg::RenderInfo& renderInfo) const
+osg::VertexArrayState* SharedGeometry::createVertexArrayStateImplementation(osg::RenderInfo& renderInfo) const
 {
     osg::State& state = *renderInfo.getState();