diff --git a/utils/fgelev/fgelev.cxx b/utils/fgelev/fgelev.cxx
index a4e2a714b..e2f4f9f4f 100644
--- a/utils/fgelev/fgelev.cxx
+++ b/utils/fgelev/fgelev.cxx
@@ -43,6 +43,7 @@
 #include <simgear/misc/ResourceManager.hxx>
 #include <simgear/scene/bvh/BVHNode.hxx>
 #include <simgear/scene/bvh/BVHLineSegmentVisitor.hxx>
+#include <simgear/scene/util/OsgMath.hxx>
 
 class FGSceneryIntersect : public osg::NodeVisitor {
 public: