diff --git a/EInAPI.h b/EInAPI.h
index 8b0d55f..8d1e5ca 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -468,6 +468,7 @@ EIN_EXPORT int  __stdcall EgtTrimCurveWithRegion(  int nCrvId, int nRegId, BOOL
 EIN_EXPORT int  __stdcall EgtSplitCurve( int nId, int nParts) ;
 EIN_EXPORT int  __stdcall EgtSplitCurveAtPoint( int nId, const double ptOn[3], int nRefType) ;
 EIN_EXPORT BOOL __stdcall EgtModifyCircleCP( int nId, const double ptOn[3], int nRefType) ;
+EIN_EXPORT BOOL __stdcall EgtModifyCircle3P( int nId, const double ptP1[3], const double ptP2[3], const double ptP3[3], int nRefType) ;
 EIN_EXPORT BOOL __stdcall EgtModifyArcRadius( int nId, double dRad) ;
 EIN_EXPORT BOOL __stdcall EgtModifyArcC2P( int nId, const double ptEnd[3], int nRefType) ;
 EIN_EXPORT BOOL __stdcall EgtModifyArc3P( int nId, const double ptMid[3], int nRefType) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 015c846..d32db7c 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -507,6 +507,7 @@ EXE_EXPORT int  ExeSplitCurveAtCorners( int nId, double dTgAngToler, int* pnCoun
 EXE_EXPORT int  ExeSplitCurveAtSelfInters( int nId, int* pnCount) ;
 EXE_EXPORT int  ExeGetCurveLinearConvexHullXY( int nId, double dLinTol, int nRefType) ;
 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) ;
 EXE_EXPORT bool ExeModifyArcC2P( int nId, const Point3d& ptEnd, int nRefType) ;
 EXE_EXPORT bool ExeModifyArc3P( int nId, const Point3d& ptMid, int nRefType) ;