diff --git a/core/src/processing/core/PApplet.java b/core/src/processing/core/PApplet.java
index 9f3486a10..cbb70aa2e 100644
--- a/core/src/processing/core/PApplet.java
+++ b/core/src/processing/core/PApplet.java
@@ -10105,6 +10105,8 @@ static public void runSketch(final String[] args,
     sketch.present = present;
     sketch.fullScreen = fullScreen;
 
+    sketch.pixelDensity = sketch.displayDensity();
+
     // For 3.0.1, moved this above handleSettings() so that loadImage() can be
     // used inside settings(). Sets a terrible precedent, but the alternative
     // of not being able to size a sketch to an image is driving people loopy.