diff --git a/src/libs/vwidgets/vgrainlineitem.cpp b/src/libs/vwidgets/vgrainlineitem.cpp
index c200a8ccc985..83110e476e99 100644
--- a/src/libs/vwidgets/vgrainlineitem.cpp
+++ b/src/libs/vwidgets/vgrainlineitem.cpp
@@ -401,6 +401,12 @@ void VGrainlineItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
         {
             dLen *= 2;
         }
+        // limit length of grainline to twice the length of the arrowheads.
+        qreal minLength = qApp->Settings()->getDefaultArrowLength() * 2.0;
+        if (m_startLength + dLen < minLength)
+        {
+            return;
+        }
         m_length = m_startLength + dLen;
 
         QPointF pos;