diff --git a/EXeExecutor.h b/EXeExecutor.h
index 41fae98..ce01091 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -632,6 +632,7 @@ EXE_EXPORT int  ExeGetCurveLinearConvexHullXY( int nId, double dLinTol, int nRef
 EXE_EXPORT bool ExeModifyCircleCP( int nId, const Point3d& ptOn, int nRefType) ;
 EXE_EXPORT bool ExeModifyCircle3P( int nId, const Point3d& ptP1, const Point3d& ptP2, const Point3d& ptP3, int nRefType) ;
 EXE_EXPORT bool ExeModifyArcRadius( int nId, double dRad, bool bKeepCenter = true) ;
+EXE_EXPORT bool ExeModifyArcAngCenter( int nId, double dAngCenter) ;
 EXE_EXPORT bool ExeModifyArcC2P( int nId, const Point3d& ptEnd, int nRefType) ;
 EXE_EXPORT bool ExeModifyArc3P( int nId, const Point3d& ptMid, int nRefType) ;
 EXE_EXPORT bool ExeModifyArcToExplementary( int nId) ;