diff --git a/dexlib2/src/main/java/org/jf/dexlib2/ReferenceType.java b/dexlib2/src/main/java/org/jf/dexlib2/ReferenceType.java
index 1056e5cd..c96b96e6 100644
--- a/dexlib2/src/main/java/org/jf/dexlib2/ReferenceType.java
+++ b/dexlib2/src/main/java/org/jf/dexlib2/ReferenceType.java
@@ -31,11 +31,10 @@
 
 package org.jf.dexlib2;
 
-public abstract class ReferenceType
-{
-    public static int String = 0;
-    public static int Type = 1;
-    public static int Field = 2;
-    public static int Method = 3;
-    public static int None = 4;
+public abstract class ReferenceType {
+    public static final int String = 0;
+    public static final int Type = 1;
+    public static final int Field = 2;
+    public static final int Method = 3;
+    public static final int None = 4;
 }
\ No newline at end of file