diff --git a/src/GEOMImpl/GEOMImpl_IVector.hxx b/src/GEOMImpl/GEOMImpl_IVector.hxx
index 2214d7dfa..b83636731 100644
--- a/src/GEOMImpl/GEOMImpl_IVector.hxx
+++ b/src/GEOMImpl/GEOMImpl_IVector.hxx
@@ -29,6 +29,10 @@
 #define VEC_ARG_PNT1 4
 #define VEC_ARG_PNT2 5
 
+#define VEC_ARG_CURVE 6
+#define VEC_ARG_PARAM 7
+
+
 class GEOMImpl_IVector
 {
  public:
@@ -49,6 +53,14 @@ class GEOMImpl_IVector
   Handle(GEOM_Function) GetPoint1() { return _func->GetReference(VEC_ARG_PNT1); }
   Handle(GEOM_Function) GetPoint2() { return _func->GetReference(VEC_ARG_PNT2); }
 
+  void SetCurve(Handle(GEOM_Function) theRef) { _func->SetReference(VEC_ARG_CURVE, theRef); }
+
+  Handle(GEOM_Function) GetCurve() { return _func->GetReference(VEC_ARG_CURVE); }
+
+  void SetParameter(double theParam) { _func->SetReal(VEC_ARG_PARAM, theParam); }
+
+  double GetParameter() { return _func->GetReal(VEC_ARG_PARAM); }
+
  private:
 
   Handle(GEOM_Function) _func;