diff --git a/src/Main/CameraGroup.cxx b/src/Main/CameraGroup.cxx
index a185d70dd..cb3f07d78 100644
--- a/src/Main/CameraGroup.cxx
+++ b/src/Main/CameraGroup.cxx
@@ -27,6 +27,7 @@
 #include "WindowSystemAdapter.hxx"
 #include <simgear/props/props.hxx>
 #include <simgear/structure/OSGUtils.hxx>
+#include <simgear/structure/OSGVersion.hxx>
 #include <simgear/scene/material/EffectCullVisitor.hxx>
 #include <simgear/scene/util/RenderConstants.hxx>