diff --git a/src/libs/vlayout/vabstractpiece.h b/src/libs/vlayout/vabstractpiece.h
index e45a8a385..2bfc21ca4 100644
--- a/src/libs/vlayout/vabstractpiece.h
+++ b/src/libs/vlayout/vabstractpiece.h
@@ -181,6 +181,7 @@ protected:
     template <class T>
     static QVector<T> RemoveDublicates(const QVector<T> &points, bool removeFirstAndLast = true);
     static qreal      MaxLocalSA(const VSAPoint &p, qreal width);
+    static bool       IsEkvPointOnLine(const QPointF &iPoint, const QPointF &prevPoint, const QPointF &nextPoint);
     static bool       IsEkvPointOnLine(const VSAPoint &iPoint, const VSAPoint &prevPoint, const VSAPoint &nextPoint);
 
 private:
@@ -213,7 +214,6 @@ private:
     static QPointF          SingleParallelPoint(const QPointF &p1, const QPointF &p2, qreal angle, qreal width);
     static QLineF           BisectorLine(const QPointF &p1, const QPointF &p2, const QPointF &p3);
     static qreal            AngleBetweenBisectors(const QLineF &b1, const QLineF &b2);
-    static bool             IsEkvPointOnLine(const QPointF &iPoint, const QPointF &prevPoint, const QPointF &nextPoint);
 };
 
 Q_DECLARE_TYPEINFO(VAbstractPiece, Q_MOVABLE_TYPE);
diff --git a/src/libs/vpatterndb/vpiece.cpp b/src/libs/vpatterndb/vpiece.cpp
index fff605cb3..d5fc46c57 100644
--- a/src/libs/vpatterndb/vpiece.cpp
+++ b/src/libs/vpatterndb/vpiece.cpp
@@ -991,7 +991,16 @@ bool VPiece::GetSeamPassmarkSAPoint(const VSAPoint &previousSAPoint, const VSAPo
 
     QVector<QPointF> ekvPoints;
     const qreal width = ToPixel(GetSAWidth(), *data->GetPatternUnit());
-    if (IsEkvPointOnLine(passmarkSAPoint, previousSAPoint, nextSAPoint)) // see issue #665
+
+    /* Because method VAbstractPiece::EkvPoint has troubles with edges on a same line we should specially treat such
+       cases.
+       First check if two edges and seam alowance create paralell lines.
+       Second case check if two edges are on a same line geometrically and a passmark point has equal SA width.*/
+    if (IsEkvPointOnLine(passmarkSAPoint, previousSAPoint, nextSAPoint)// see issue #665
+        || (IsEkvPointOnLine(static_cast<QPointF>(passmarkSAPoint), static_cast<QPointF>(previousSAPoint),
+                             static_cast<QPointF>(nextSAPoint))
+            && qAbs(passmarkSAPoint.GetSABefore(width)
+                    - passmarkSAPoint.GetSAAfter(width)) < VGObject::accuracyPointOnLine))
     {
         QLineF line (passmarkSAPoint, nextSAPoint);
         line.setAngle(line.angle() + 90);