diff --git a/src/osgProducer/ViewerEventHandler.cpp b/src/osgProducer/ViewerEventHandler.cpp
index 07e7f1df7..b5d2bdfc0 100644
--- a/src/osgProducer/ViewerEventHandler.cpp
+++ b/src/osgProducer/ViewerEventHandler.cpp
@@ -919,7 +919,7 @@ void ViewerEventHandler::getUsage(osg::ApplicationUsage& usage) const
     usage.addKeyboardMouseBinding("h","Display help");
     usage.addKeyboardMouseBinding("o","Write scene graph to \"saved_model.osg\"");
     usage.addKeyboardMouseBinding("O PrtSrn","Write camera images to \"saved_image*.rgb\"");
-    usage.addKeyboardMouseBinding("s","Toggle intrumention");
+    usage.addKeyboardMouseBinding("s","Toggle instrumention");
     usage.addKeyboardMouseBinding("v","Toggle block and vsync");
     usage.addKeyboardMouseBinding("z","Start recording camera path.");
     usage.addKeyboardMouseBinding("Z","If recording camera path stop recording camera path, save to \"saved_animation.path\"\nThen start viewing from being on animation path");