diff --git a/src/app/dialogs/tools/dialogspline.cpp b/src/app/dialogs/tools/dialogspline.cpp
index 2f4c3d0cc..bb971d035 100644
--- a/src/app/dialogs/tools/dialogspline.cpp
+++ b/src/app/dialogs/tools/dialogspline.cpp
@@ -47,6 +47,10 @@ DialogSpline::DialogSpline(const VContainer *data, QWidget *parent)
 
     FillComboBoxPoints(ui->comboBoxP1);
     FillComboBoxPoints(ui->comboBoxP4);
+    connect(ui->comboBoxP1, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogSpline::PointNameChanged);
+    connect(ui->comboBoxP4, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogSpline::PointNameChanged);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -129,6 +133,28 @@ void DialogSpline::DialogAccepted()
     emit DialogClosed(QDialog::Accepted);
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogSpline::PointNameChanged()
+{
+    QSet<quint32> set;
+    set.insert(getCurrentObjectId(ui->comboBoxP1));
+    set.insert(getCurrentObjectId(ui->comboBoxP4));
+
+    if (getCurrentObjectId(ui->comboBoxP1) == getCurrentObjectId(ui->comboBoxP4))
+    {
+        flagError = false;
+        ChangeColor(ui->labelFirstPoint, Qt::red);
+        ChangeColor(ui->labelSecondPoint, Qt::red);
+    }
+    else
+    {
+        flagError = true;
+        ChangeColor(ui->labelFirstPoint, QColor(76, 76, 76));
+        ChangeColor(ui->labelSecondPoint, QColor(76, 76, 76));
+    }
+    CheckState();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief setKCurve set coefficient curve
@@ -191,8 +217,7 @@ void DialogSpline::setAngle1(const qreal &value)
  */
 void DialogSpline::setP4(const quint32 &value)
 {
-    p4 = value;
-    ChangeCurrentData(ui->comboBoxP4, value);
+    setPointId(ui->comboBoxP4, p4, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -202,8 +227,7 @@ void DialogSpline::setP4(const quint32 &value)
  */
 void DialogSpline::setP1(const quint32 &value)
 {
-    p1 = value;
-    ChangeCurrentData(ui->comboBoxP1, value);
+    setPointId(ui->comboBoxP1, p1, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogspline.h b/src/app/dialogs/tools/dialogspline.h
index d90cd2990..28c99ea09 100644
--- a/src/app/dialogs/tools/dialogspline.h
+++ b/src/app/dialogs/tools/dialogspline.h
@@ -72,7 +72,8 @@ public slots:
     /** TODO ISSUE 79 : create real function
      * @brief DialogApply apply data and emit signal about applied dialog.
      */
-    virtual void      DialogApply(){}
+    virtual void  DialogApply(){}
+    virtual void  PointNameChanged();
 private:
     Q_DISABLE_COPY(DialogSpline)
 
diff --git a/src/app/dialogs/tools/dialogspline.ui b/src/app/dialogs/tools/dialogspline.ui
index 3ffcdae4d..721ffae3b 100644
--- a/src/app/dialogs/tools/dialogspline.ui
+++ b/src/app/dialogs/tools/dialogspline.ui
@@ -28,7 +28,7 @@
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_2">
          <item>
-          <widget class="QLabel" name="label">
+          <widget class="QLabel" name="labelFirstPoint">
            <property name="text">
             <string>First point</string>
            </property>
@@ -91,7 +91,7 @@
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_5">
          <item>
-          <widget class="QLabel" name="label_5">
+          <widget class="QLabel" name="labelSecondPoint">
            <property name="text">
             <string>Second point</string>
            </property>