diff --git a/Shared/Geometry.cs b/Shared/Geometry.cs
index 58e1eff..deb144a 100644
--- a/Shared/Geometry.cs
+++ b/Shared/Geometry.cs
@@ -19,7 +19,7 @@ namespace SemiColinGames {
   public static class FMath {
     public const float PI = (float) Math.PI;
 
-    private static float[] degToRad = new float[360];
+    private readonly static float[] degToRad = new float[360];
 
     static FMath() {
       for (int i = 0; i < degToRad.Length; i++) {