diff --git a/src/osgProducer/OsgCameraGroup.cpp b/src/osgProducer/OsgCameraGroup.cpp
index 9725d0868..0659adf39 100644
--- a/src/osgProducer/OsgCameraGroup.cpp
+++ b/src/osgProducer/OsgCameraGroup.cpp
@@ -207,7 +207,7 @@ OsgCameraGroup::~OsgCameraGroup()
 
 
 static osg::ApplicationUsageProxy OsgCameraGroup_e2(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_CAMERA_THREADING <value>","Set the threading model using by osgProducer::Viewer/OsgCameraGroup based apps. <value> can be SingleThreaded or ThreadPerCamera");
-static osg::ApplicationUsageProxy OsgCameraGroup_e3(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SHARE_GRAPHICS_CONTEXTS <value>","Set the threading model using by osgProducer::Viewer/OsgCameraGroup based apps. <value> can be ON or OFF");
+static osg::ApplicationUsageProxy OsgCameraGroup_e3(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SHARE_GRAPHICS_CONTEXTS <value>","Set whether to share graphics contexts. <value> can be ON or OFF");
 
 void OsgCameraGroup::_init()
 {