diff --git a/src/nodes/QskArcNode.cpp b/src/nodes/QskArcNode.cpp
index a3fd4042..eb9c8284 100644
--- a/src/nodes/QskArcNode.cpp
+++ b/src/nodes/QskArcNode.cpp
@@ -130,8 +130,9 @@ void QskArcNode::setArcData( const QRectF& rect, const QskArcMetrics& arcMetrics
     }
 
     const auto isFillNodeVisible = gradient.isVisible() && !metricsArc.isNull();
-    const auto isStrokeNodeVisible = borderWidth > 0.0 && borderColor.alpha() > 0;
-    const auto isShadowNodeVisible = shadowColor.alpha() > 0.0 && isFillNodeVisible;
+    const auto isStrokeNodeVisible = ( borderWidth > 0.0 ) && ( borderColor.alpha() > 0 );
+    const auto isShadowNodeVisible = isFillNodeVisible &&
+        shadowColor.isValid() && ( shadowColor.alpha() > 0.0 );
 
     const auto path = metricsArc.painterPath( arcRect );