diff --git a/include/osgDB/DataTypes b/include/osgDB/DataTypes
index 8014c244e..ee480ed72 100644
--- a/include/osgDB/DataTypes
+++ b/include/osgDB/DataTypes
@@ -16,6 +16,7 @@
 #define OSGDB_DATATYPES
 
 #include <string>
+#include <osg/GL>
 
 namespace osgDB
 {
diff --git a/include/osgDB/StreamOperator b/include/osgDB/StreamOperator
index 2813f017c..61c7f4daa 100644
--- a/include/osgDB/StreamOperator
+++ b/include/osgDB/StreamOperator
@@ -3,6 +3,8 @@
 
 #include <iostream>
 #include <sstream>
+#include <osg/Referenced>
+#include <osgDB/Export>
 #include <osgDB/DataTypes>
 
 namespace osgDB
diff --git a/src/osgDB/CMakeLists.txt b/src/osgDB/CMakeLists.txt
index e79f67148..b4adbdcfe 100644
--- a/src/osgDB/CMakeLists.txt
+++ b/src/osgDB/CMakeLists.txt
@@ -114,6 +114,7 @@ SET(TARGET_SRC
     ReadFile.cpp
     Registry.cpp
     SharedStateManager.cpp
+    StreamOperator.cpp
     Version.cpp
     WriteFile.cpp
     XmlParser.cpp
diff --git a/src/osgDB/StreamOperator.cpp b/src/osgDB/StreamOperator.cpp
new file mode 100644
index 000000000..add39443d
--- /dev/null
+++ b/src/osgDB/StreamOperator.cpp
@@ -0,0 +1,24 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2011 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include <osgDB/StreamOperator>
+#include <osgDB/InputStream>
+
+using namespace osgDB;
+
+void InputIterator::throwException( const std::string& msg )
+{
+    if (_inputStream) _inputStream->throwException(msg);
+    else OSG_WARN << msg << std::endl;
+}
+