diff --git a/effects/blur/blur.cpp b/effects/blur/blur.cpp
--- a/effects/blur/blur.cpp
+++ b/effects/blur/blur.cpp
@@ -236,7 +236,7 @@
     m_expandSize = blurOffsets[m_downSampleIterations - 1].expandSize;
     m_noiseStrength = BlurConfig::noiseStrength();
 
-    m_scalingFactor = QGuiApplication::primaryScreen()->logicalDotsPerInch() / 96.0;
+    m_scalingFactor = qMax(1.0, QGuiApplication::primaryScreen()->logicalDotsPerInch() / 96.0);
 
     updateTexture();