diff --git a/src/app/options.h b/src/app/options.h
index e2a2a7d4d..364068ddf 100644
--- a/src/app/options.h
+++ b/src/app/options.h
@@ -37,9 +37,11 @@
 
 class QString;
 
+static const quint32 null_id = 0;
+
 #define SceneSize 50000
 #define DefPointRadius 2.0//mm
-#define NULL_ID 0//use this value for initialization variables that keeps id values. 0 mean uknown id value.
+#define NULL_ID null_id//use this value for initialization variables that keeps id values. 0 mean uknown id value.
 
 enum class SceneObject : char { Point, Line, Spline, Arc, SplinePath, Detail, Unknown };
 enum class Tool : unsigned char
diff --git a/src/app/tools/drawTools/vtoolalongline.cpp b/src/app/tools/drawTools/vtoolalongline.cpp
index 0fe0eb783..a8785b98a 100644
--- a/src/app/tools/drawTools/vtoolalongline.cpp
+++ b/src/app/tools/drawTools/vtoolalongline.cpp
@@ -166,10 +166,13 @@ quint32 VToolAlongLine::getSecondPointId() const
 //---------------------------------------------------------------------------------------------------------------------
 void VToolAlongLine::setSecondPointId(const quint32 &value)
 {
-    secondPointId = value;
+    if (value != NULL_ID)
+    {
+        secondPointId = value;
 
-    QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
-    SaveOption(obj);
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
+        SaveOption(obj);
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/tools/drawTools/vtoolarc.cpp b/src/app/tools/drawTools/vtoolarc.cpp
index 6a5b1f625..5b22e6a92 100644
--- a/src/app/tools/drawTools/vtoolarc.cpp
+++ b/src/app/tools/drawTools/vtoolarc.cpp
@@ -184,12 +184,15 @@ quint32 VToolArc::getCenter() const
 //---------------------------------------------------------------------------------------------------------------------
 void VToolArc::setCenter(const quint32 &value)
 {
-    QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
-    QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
+    if (value != NULL_ID)
+    {
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
+        QSharedPointer<VArc> arc = qSharedPointerDynamicCast<VArc>(obj);
 
-    QSharedPointer<VPointF> point = VAbstractTool::data.GeometricObject<VPointF>(value);
-    arc->SetCenter(*point.data());
-    SaveOption(obj);
+        QSharedPointer<VPointF> point = VAbstractTool::data.GeometricObject<VPointF>(value);
+        arc->SetCenter(*point.data());
+        SaveOption(obj);
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/tools/drawTools/vtoolbisector.cpp b/src/app/tools/drawTools/vtoolbisector.cpp
index 7f25bde4d..cd4f9eee6 100644
--- a/src/app/tools/drawTools/vtoolbisector.cpp
+++ b/src/app/tools/drawTools/vtoolbisector.cpp
@@ -309,3 +309,40 @@ void VToolBisector::SaveOptions(QDomElement &tag, QSharedPointer<VGObject> &obj)
     doc->SetAttribute(tag, AttrSecondPoint, basePointId);
     doc->SetAttribute(tag, AttrThirdPoint, thirdPointId);
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+quint32 VToolBisector::getThirdPointId() const
+{
+    return thirdPointId;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VToolBisector::setThirdPointId(const quint32 &value)
+{
+    if (value != NULL_ID)
+    {
+        thirdPointId = value;
+
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
+        SaveOption(obj);
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+quint32 VToolBisector::getFirstPointId() const
+{
+    return firstPointId;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VToolBisector::setFirstPointId(const quint32 &value)
+{
+    if (value != NULL_ID)
+    {
+        firstPointId = value;
+
+        QSharedPointer<VGObject> obj = VAbstractTool::data.GetGObject(id);
+        SaveOption(obj);
+    }
+}
+
diff --git a/src/app/tools/drawTools/vtoolbisector.h b/src/app/tools/drawTools/vtoolbisector.h
index 8bc7bd0e5..c0cee1b78 100644
--- a/src/app/tools/drawTools/vtoolbisector.h
+++ b/src/app/tools/drawTools/vtoolbisector.h
@@ -55,6 +55,13 @@ public:
     static const QString ToolType;
     virtual int    type() const {return Type;}
     enum { Type = UserType + static_cast<int>(Tool::Bisector)};
+
+    quint32 getFirstPointId() const;
+    void    setFirstPointId(const quint32 &value);
+
+    quint32 getThirdPointId() const;
+    void    setThirdPointId(const quint32 &value);
+
 public slots:
     virtual void   FullUpdateFromFile();
     virtual void   SetFactor(qreal factor);