diff --git a/EXeExecutor.h b/EXeExecutor.h
index b273a1e..7f705fc 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -939,6 +939,7 @@ EXE_EXPORT int  ExeCurveSurfTmInters( const int nCrvId, const int nStmId, const
                                       int* pnPntCount, int* pnCrvCount) ;
 EXE_EXPORT int  ExeSurfTmSurfTmInters( int nId1, int nId2, int nDestGrpId, double dToler,
                                        int* pnPntCount, int* pnCrvCount, int* pnSrfCount) ;
+EXE_EXPORT bool ExeBBoxOverlap( const BBox3d& bboxA, const Frame3d& frA, const BBox3d& bboxB, const Frame3d& frB) ;
 
 // Collision Detection
 EXE_EXPORT int  ExeCDeBoxSolid( const Frame3d& frBox, const Vector3d& vtDiag, int nSolidId, double dSafeDist, int nRefType) ;