diff --git a/src/app/container/container.pri b/src/app/container/container.pri
index 7ee5145f1..3e8dd7bfe 100644
--- a/src/app/container/container.pri
+++ b/src/app/container/container.pri
@@ -26,4 +26,5 @@ HEADERS += \
     container/vsplinelength.h \
     container/vinternalvariable_p.h \
     container/vvariable_p.h \
-    container/vincrement_p.h
+    container/vincrement_p.h \
+    container/vcurvelength_p.h
diff --git a/src/app/container/vcurvelength.cpp b/src/app/container/vcurvelength.cpp
index 6d2d62e08..1709066e5 100644
--- a/src/app/container/vcurvelength.cpp
+++ b/src/app/container/vcurvelength.cpp
@@ -27,19 +27,20 @@
  *************************************************************************/
 
 #include "vcurvelength.h"
+#include "vcurvelength_p.h"
 #include "../widgets/vapplication.h"
 #include "../geometry/vabstractcurve.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 VCurveLength::VCurveLength()
-    :VInternalVariable(), id(NULL_ID), parentId(NULL_ID)
+    :VInternalVariable(), d(new VCurveLengthData)
 {
     SetType(VarType::Unknown);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 VCurveLength::VCurveLength(const quint32 &id, const quint32 &parentId, const VAbstractCurve *curve)
-    :VInternalVariable(), id(id), parentId(parentId)
+    :VInternalVariable(), d(new VCurveLengthData(id, parentId))
 {
     SetType(VarType::Unknown);
     SCASSERT(curve != nullptr);
@@ -49,7 +50,7 @@ VCurveLength::VCurveLength(const quint32 &id, const quint32 &parentId, const VAb
 
 //---------------------------------------------------------------------------------------------------------------------
 VCurveLength::VCurveLength(const VCurveLength &var)
-    :VInternalVariable(var), id(var.GetId()), parentId(var.GetParentId())
+    :VInternalVariable(var), d(var.d)
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -60,8 +61,7 @@ VCurveLength &VCurveLength::operator=(const VCurveLength &var)
         return *this;
     }
     VInternalVariable::operator=(var);
-    this->id = var.GetId();
-    this->parentId = var.GetParentId();
+    d = var.d;
     return *this;
 }
 
@@ -72,12 +72,36 @@ VCurveLength::~VCurveLength()
 //---------------------------------------------------------------------------------------------------------------------
 bool VCurveLength::Filter(quint32 id)
 {
-    if (parentId != 0)//Do not check if value zero
+    if (d->parentId != 0)//Do not check if value zero
     {// Not all curves have parents. Only those who was created after cutting the parent curve.
-        return this->id == id || parentId == id;
+        return d->id == id || d->parentId == id;
     }
     else
     {
-        return this->id == id;
+        return d->id == id;
     }
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+quint32 VCurveLength::GetId() const
+{
+    return d->id;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VCurveLength::SetId(const quint32 &id)
+{
+    d->id = id;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+quint32 VCurveLength::GetParentId() const
+{
+    return d->parentId;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VCurveLength::SetParentId(const quint32 &value)
+{
+    d->parentId = value;
+}
diff --git a/src/app/container/vcurvelength.h b/src/app/container/vcurvelength.h
index ab4b97e3b..15d45f672 100644
--- a/src/app/container/vcurvelength.h
+++ b/src/app/container/vcurvelength.h
@@ -32,6 +32,7 @@
 #include "vinternalvariable.h"
 
 class VAbstractCurve;
+class VCurveLengthData;
 
 class VCurveLength : public VInternalVariable
 {
@@ -43,23 +44,14 @@ public:
     virtual ~VCurveLength();
 
     virtual bool Filter(quint32 id);
+
     quint32      GetId() const;
+    void         SetId(const quint32 &id);
+
     quint32      GetParentId() const;
-protected:
-    quint32 id;
-    quint32 parentId;
+    void         SetParentId(const quint32 &value);
+private:
+    QSharedDataPointer<VCurveLengthData> d;
 };
 
-//---------------------------------------------------------------------------------------------------------------------
-inline quint32 VCurveLength::GetId() const
-{
-    return id;
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-inline quint32 VCurveLength::GetParentId() const
-{
-    return parentId;
-}
-
 #endif // VCURVELENGTH_H
diff --git a/src/app/container/vcurvelength_p.h b/src/app/container/vcurvelength_p.h
new file mode 100644
index 000000000..1135bcebb
--- /dev/null
+++ b/src/app/container/vcurvelength_p.h
@@ -0,0 +1,58 @@
+/************************************************************************
+ **
+ **  @file   vcurvelength_p.h
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   20 8, 2014
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2014 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#ifndef VCURVELENGTH_P_H
+#define VCURVELENGTH_P_H
+
+#include <QSharedData>
+#include "../options.h"
+
+class VCurveLengthData : public QSharedData
+{
+public:
+
+    VCurveLengthData()
+        :id(NULL_ID), parentId(NULL_ID)
+    {}
+
+    VCurveLengthData(const quint32 &id, const quint32 &parentId)
+        :id(id), parentId(parentId)
+    {}
+
+    VCurveLengthData(const VCurveLengthData &var)
+        :QSharedData(var), id(var.id), parentId(var.parentId)
+    {}
+
+    virtual  ~VCurveLengthData() {}
+
+    quint32 id;
+    quint32 parentId;
+};
+
+
+#endif // VCURVELENGTH_P_H
diff --git a/src/app/container/vsplinelength.cpp b/src/app/container/vsplinelength.cpp
index ae92567e7..45d277b10 100644
--- a/src/app/container/vsplinelength.cpp
+++ b/src/app/container/vsplinelength.cpp
@@ -43,8 +43,8 @@ VSplineLength::VSplineLength(const quint32 &id, const quint32 &parentId, const Q
     SetType(VarType::SplineLength);
     SetName(name);
     SetValue(value);
-    this->id = id;
-    this->parentId = parentId;
+    SetId(id);
+    SetParentId(parentId);
 }
 
 //---------------------------------------------------------------------------------------------------------------------