diff --git a/ChangeLog.txt b/ChangeLog.txt
index c6116de3e..b3982e436 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -17,6 +17,7 @@
 - [#537] Valentina crashes when use undo command.
 - [#544] Error: Color Lines are black until touched.
 - [#543] Detail loses details.
+- [#548] Bug Detail tool. Case when seam allowance is wrong.
 
 # Version 0.4.4 April 12, 2016
 - Updated measurement templates with all measurements. Added new template Aldrich/Women measurements.
diff --git a/src/libs/vlayout/vabstractdetail.cpp b/src/libs/vlayout/vabstractdetail.cpp
index 0734f2f10..0df18f21c 100644
--- a/src/libs/vlayout/vabstractdetail.cpp
+++ b/src/libs/vlayout/vabstractdetail.cpp
@@ -265,7 +265,6 @@ QVector<QPointF> VAbstractDetail::RemoveDublicates(const QVector<QPointF> &point
  */
 QVector<QPointF> VAbstractDetail::CorrectEquidistantPoints(const QVector<QPointF> &points)
 {
-    QVector<QPointF> correctPoints;
     if (points.size()<4)//Better don't check if only three points. We can destroy equidistant.
     {
         qDebug()<<"Only three points.";
@@ -273,20 +272,17 @@ QVector<QPointF> VAbstractDetail::CorrectEquidistantPoints(const QVector<QPointF
     }
 
     //Clear equivalent points
-    correctPoints = RemoveDublicates(points);
+    QVector<QPointF> correctPoints = RemoveDublicates(points);
 
     if (correctPoints.size()<3)
     {
         return correctPoints;
     }
     //Remove point on line
-    QPointF point;
     for (qint32 i = 1; i <correctPoints.size()-1; ++i)
-    {
-        QLineF l1(correctPoints.at(i-1), correctPoints.at(i));
-        QLineF l2(correctPoints.at(i), correctPoints.at(i+1));
-        QLineF::IntersectType intersect = l1.intersect(l2, &point);
-        if (intersect == QLineF::NoIntersection)
+    {// In this case we alwayse will have bounded intersection, so all is need is to check if point i is on line.
+     // Unfortunatelly QLineF::intersect can't be used in this case because of the floating-point accuraccy problem.
+        if (VGObject::IsPointOnLineviaPDP(correctPoints.at(i), correctPoints.at(i-1), correctPoints.at(i+1)))
         {
             correctPoints.remove(i);
         }
diff --git a/src/libs/vlayout/vabstractdetail.h b/src/libs/vlayout/vabstractdetail.h
index 9ec07e7fb..f933a1e05 100644
--- a/src/libs/vlayout/vabstractdetail.h
+++ b/src/libs/vlayout/vabstractdetail.h
@@ -67,10 +67,10 @@ public:
     static QVector<QPointF> Equidistant(const QVector<QPointF> &points, const EquidistantType &eqv, qreal width);
     static qreal            SumTrapezoids(const QVector<QPointF> &points);
     static QVector<QPointF> CheckLoops(const QVector<QPointF> &points);
+    static QVector<QPointF> CorrectEquidistantPoints(const QVector<QPointF> &points);
 
 protected:
     static QVector<QPointF> RemoveDublicates(const QVector<QPointF> &points);
-    static QVector<QPointF> CorrectEquidistantPoints(const QVector<QPointF> &points);
 
 private:
     QSharedDataPointer<VAbstractDetailData> d;