diff --git a/src/libs/vpatterndb/vpassmark.cpp b/src/libs/vpatterndb/vpassmark.cpp
index a67c4d76c..13a816d8c 100644
--- a/src/libs/vpatterndb/vpassmark.cpp
+++ b/src/libs/vpatterndb/vpassmark.cpp
@@ -531,7 +531,7 @@ auto CreateCheckMarkPassmark(const VPiecePassmarkData &passmarkData, const QLine
                              const QVector<QPointF> &seamAllowance) -> QVector<QLineF>
 {
     constexpr qreal defAngle = 45;
-    qreal defWidth = line.length() * qTan(qDegreesToRadians(defAngle));
+    qreal defWidth = qAbs(line.length() * qTan(qDegreesToRadians(defAngle)));
 
     if (not passmarkData.passmarkSAPoint.IsPassmarkClockwiseOpening())
     {
@@ -544,14 +544,14 @@ auto CreateCheckMarkPassmark(const VPiecePassmarkData &passmarkData, const QLine
     if (width > 0)
     { // clockwise
         QLineF l1(line.p2(), line.p1());
-        l1.setAngle(l1.angle() + angle);
+        l1.setAngle(l1.angle() - angle);
         l1 = VPassmark::FindIntersection(l1, seamAllowance);
 
         return {{l1.p2(), l1.p1()}, {line.p2(), line.p1()}};
     }
 
     QLineF l2(line.p2(), line.p1());
-    l2.setAngle(l2.angle() - angle);
+    l2.setAngle(l2.angle() + angle);
     l2 = VPassmark::FindIntersection(l2, seamAllowance);
 
     return {line, l2};