diff --git a/components/resource/bulletshapemanager.cpp b/components/resource/bulletshapemanager.cpp
index 0d0f81962b..5b6dce067c 100644
--- a/components/resource/bulletshapemanager.cpp
+++ b/components/resource/bulletshapemanager.cpp
@@ -4,7 +4,6 @@
 #include <osg/TriangleFunctor>
 #include <osg/Transform>
 #include <osg/Drawable>
-#include <osg/Version>
 
 #include <BulletCollision/CollisionShapes/btTriangleMesh.h>
 
@@ -45,11 +44,7 @@ struct GetTriangleFunctor
         return btVector3(vec.x(), vec.y(), vec.z());
     }
 
-#if OSG_MIN_VERSION_REQUIRED(3,5,6)
-    void inline operator()( const osg::Vec3& v1, const osg::Vec3& v2, const osg::Vec3& v3 )
-#else
-    void inline operator()( const osg::Vec3& v1, const osg::Vec3& v2, const osg::Vec3& v3, bool _temp )
-#endif
+    void inline operator()( const osg::Vec3& v1, const osg::Vec3& v2, const osg::Vec3& v3, bool _temp=false ) // Note: unused temp argument left here for OSG versions less than 3.5.6 
     {
         if (mTriMesh)
             mTriMesh->addTriangle( toBullet(mMatrix.preMult(v1)), toBullet(mMatrix.preMult(v2)), toBullet(mMatrix.preMult(v3)));