diff --git a/src/osg/CMakeLists.txt b/src/osg/CMakeLists.txt
index 3c43b4bf0..bfce397e7 100644
--- a/src/osg/CMakeLists.txt
+++ b/src/osg/CMakeLists.txt
@@ -38,6 +38,7 @@ SET(TARGET_H
     ${HEADER_PATH}/BufferIndexBinding
     ${HEADER_PATH}/BufferObject
     ${HEADER_PATH}/BufferTemplate
+    ${HEADER_PATH}/Callback
     ${HEADER_PATH}/Camera
     ${HEADER_PATH}/CameraView
     ${HEADER_PATH}/ClampColor