diff --git a/EMkMachMgr.h b/EMkMachMgr.h
index be7b72c..2f1b38e 100644
--- a/EMkMachMgr.h
+++ b/EMkMachMgr.h
@@ -160,6 +160,7 @@ class __declspec( novtable) IMachMgr
                                   int& nStat, double& dAngA1, double& dAngB1, double& dAngA2, double& dAngB2) = 0 ;
       virtual bool GetCalcPositions( const Point3d& ptP, double dAngA, double dAngB,
                                      int& nStat, double& dX, double& dY, double& dZ) = 0 ;
+      virtual bool GetNearestAngleInStroke( int nId, double dAngRef, double& dAng) = 0 ;
       virtual bool VerifyOutOfStroke( double dX, double dY, double dZ, double dAngA, double dAngB, int& nStat) = 0 ;
      // Machine Move
       virtual bool SetAxisPos( const std::string& sAxis, double dVal) = 0 ;