diff --git a/engine/src/flutter/shell/platform/android/io/flutter/embedding/android/KeyData.java b/engine/src/flutter/shell/platform/android/io/flutter/embedding/android/KeyData.java
index 776372c801..ef3b8eb6d8 100644
--- a/engine/src/flutter/shell/platform/android/io/flutter/embedding/android/KeyData.java
+++ b/engine/src/flutter/shell/platform/android/io/flutter/embedding/android/KeyData.java
@@ -75,7 +75,7 @@ public class KeyData {
     kJoystick(3),
     kHdmi(4);
 
-    private long value;
+    private final long value;
 
     private DeviceType(long value) {
       this.value = value;