diff --git a/src/GEOM_I/GEOM_ICurvesOperations_i.cc b/src/GEOM_I/GEOM_ICurvesOperations_i.cc
index bbd162e11..078950c30 100644
--- a/src/GEOM_I/GEOM_ICurvesOperations_i.cc
+++ b/src/GEOM_I/GEOM_ICurvesOperations_i.cc
@@ -474,7 +474,7 @@ GEOM::GEOM_Object_ptr GEOM_ICurvesOperations_i::MakeCurveParametric(const char*
  */
 //=============================================================================
 GEOM::GEOM_Object_ptr GEOM_ICurvesOperations_i::MakeCurveParametricNew(const char* thexExpr, const char* theyExpr, const char* thezExpr, 
-                                    double theParamMin, double theParamMax, int theParamNbStep, 
+                                    double theParamMin, double theParamMax, CORBA::Long theParamNbStep, 
                                     GEOM::curve_type theCurveType) {
   GEOM::GEOM_Object_var aGEOMObject;
   //Set a not done flag
diff --git a/src/GEOM_I/GEOM_ICurvesOperations_i.hh b/src/GEOM_I/GEOM_ICurvesOperations_i.hh
index 11b1fb5e4..31e1eff4f 100644
--- a/src/GEOM_I/GEOM_ICurvesOperations_i.hh
+++ b/src/GEOM_I/GEOM_ICurvesOperations_i.hh
@@ -91,7 +91,7 @@ class GEOM_I_EXPORT GEOM_ICurvesOperations_i :
 					    GEOM::curve_type theCurveType);
   
   GEOM::GEOM_Object_ptr MakeCurveParametricNew(const char* thexExpr, const char* theyExpr, const char* thezExpr, 
-                        double theParamMin, double theParamMax, int theParamNbStep, 
+                        double theParamMin, double theParamMax, CORBA::Long theParamNbStep, 
                         GEOM::curve_type theCurveType);
 
   GEOM::GEOM_Object_ptr MakeSketcher (const char* theCommand, const GEOM::ListOfDouble& theWorkingPlane);