diff --git a/EInAPI.h b/EInAPI.h
index 61d590c..b5f4d58 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -469,6 +469,8 @@ EIN_EXPORT BOOL __stdcall EgtGetObstacleTangent( double vtTang[3]) ;
 EIN_EXPORT BOOL __stdcall EgtGetMovingTangent( double vtTang[3]) ;
 EIN_EXPORT BOOL __stdcall EgtRotatePartCluster( int nId[], int nCount, BOOL bReducedCut, const double ptCen[3], double* pdRotAngDeg, 
                                                 double dXmin, double dYmin, double dXmax, double dYmax) ;
+EIN_EXPORT BOOL __stdcall EgtAlignPartClusterOnCollision( int nId[], int nCount, BOOL bReducedCut,
+                                                          double dXmin, double dYmin, double dXmax, double dYmax) ;
 EIN_EXPORT BOOL __stdcall EgtGetPartClusterCenterGlob( int nId[], int nCount, double ptCen[3]) ;
 
 // Machining
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 304a46e..ad63086 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -498,6 +498,8 @@ EXE_EXPORT bool ExeGetObstacleTangent( Vector3d& vtTang) ;
 EXE_EXPORT bool ExeGetMovingTangent( Vector3d& vtTang) ;
 EXE_EXPORT bool ExeRotatePartCluster( const INTVECTOR& vIds, bool bReducedCut, const Point3d& ptCen, double& dRotAngDeg,
                                       double dXmin, double dYmin, double dXmax, double dYmax) ;
+EXE_EXPORT bool ExeAlignPartClusterOnCollision( const INTVECTOR& vIds, bool bReducedCut,
+                                                double dXmin, double dYmin, double dXmax, double dYmax) ;
 EXE_EXPORT bool ExeGetPartClusterCenterGlob( const INTVECTOR& vIds, Point3d& ptCen) ;
 
 // Machining