diff --git a/src/osgWrappers/serializers/osg/Texture.cpp b/src/osgWrappers/serializers/osg/Texture.cpp
index bd50076cf..c991deb89 100644
--- a/src/osgWrappers/serializers/osg/Texture.cpp
+++ b/src/osgWrappers/serializers/osg/Texture.cpp
@@ -95,6 +95,8 @@ REGISTER_OBJECT_WRAPPER( Texture,
         ADD_ENUM_VALUE( USE_S3TC_DXT1_COMPRESSION );
         ADD_ENUM_VALUE( USE_S3TC_DXT3_COMPRESSION );
         ADD_ENUM_VALUE( USE_S3TC_DXT5_COMPRESSION );
+        ADD_ENUM_VALUE( USE_RGTC1_COMPRESSION );
+        ADD_ENUM_VALUE( USE_RGTC2_COMPRESSION );
     END_ENUM_SERIALIZER();  // _internalFormatMode
     
     ADD_USER_SERIALIZER( InternalFormat );  // _internalFormat