diff --git a/osu.Game/Rulesets/UI/ModIcon.cs b/osu.Game/Rulesets/UI/ModIcon.cs
index 957ffc18e4..b23028098f 100644
--- a/osu.Game/Rulesets/UI/ModIcon.cs
+++ b/osu.Game/Rulesets/UI/ModIcon.cs
@@ -24,7 +24,7 @@ namespace osu.Game.Rulesets.UI
             set { modIcon.Icon = value; }
         }
 
-        private ModType type;
+        private readonly ModType type;
 
         public ModIcon(Mod mod)
         {