diff --git a/src/osg/Texture.cpp b/src/osg/Texture.cpp
index aa5ee3f23..690f89da1 100644
--- a/src/osg/Texture.cpp
+++ b/src/osg/Texture.cpp
@@ -50,6 +50,8 @@ using namespace osg;
 
 //#define DO_TIMING
 
+namespace osg {
+
 ApplicationUsageProxy Texture_e0(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_MAX_TEXTURE_SIZE","Set the maximum size of textures.");
 
 class TextureObjectManager : public osg::Referenced
@@ -124,6 +126,8 @@ public:
     OpenThreads::Mutex      _mutex;
 };
 
+}
+
 unsigned int Texture::s_numberTextureReusedLastInLastFrame = 0;
 unsigned int Texture::s_numberNewTextureInLastFrame = 0;
 unsigned int Texture::s_numberDeletedTextureInLastFrame = 0;