diff --git a/android/source/src/java/org/mozilla/gecko/gfx/DisplayPortCalculator.java b/android/source/src/java/org/mozilla/gecko/gfx/DisplayPortCalculator.java
index 212a3080a7fa..befea1eb5a2b 100644
--- a/android/source/src/java/org/mozilla/gecko/gfx/DisplayPortCalculator.java
+++ b/android/source/src/java/org/mozilla/gecko/gfx/DisplayPortCalculator.java
@@ -20,7 +20,7 @@ final class DisplayPortCalculator {
     // Keep this in sync with the TILEDLAYERBUFFER_TILE_SIZE defined in gfx/layers/TiledLayerBuffer.h
     private static final int TILE_SIZE = 256;
 
-    private DisplayPortStrategy sStrategy;
+    private final DisplayPortStrategy sStrategy;
 
     DisplayPortCalculator(LibreOfficeMainActivity context) {
         sStrategy = new VelocityBiasStrategy(context);