diff --git a/osu.Game/Graphics/UserInterface/OsuTabControlCheckBox.cs b/osu.Game/Graphics/UserInterface/OsuTabControlCheckBox.cs
index a09173f6e2..7dc1212318 100644
--- a/osu.Game/Graphics/UserInterface/OsuTabControlCheckBox.cs
+++ b/osu.Game/Graphics/UserInterface/OsuTabControlCheckBox.cs
@@ -21,9 +21,9 @@ namespace osu.Game.Graphics.UserInterface
     /// </summary>
     public class OsuTabControlCheckBox : CheckBox
     {
-        private Box box;
-        private SpriteText text;
-        private TextAwesome icon;
+        private readonly Box box;
+        private readonly SpriteText text;
+        private readonly TextAwesome icon;
 
         public event EventHandler<CheckBoxState> Action;
 
diff --git a/osu.Game/Screens/Select/BeatmapDetailArea.cs b/osu.Game/Screens/Select/BeatmapDetailArea.cs
index 5943a0d0ad..30a6420e68 100644
--- a/osu.Game/Screens/Select/BeatmapDetailArea.cs
+++ b/osu.Game/Screens/Select/BeatmapDetailArea.cs
@@ -16,7 +16,7 @@ namespace osu.Game.Screens.Select
     {
         private const float transition_duration = 500;
 
-        private Container content;
+        private readonly Container content;
         protected override Container<Drawable> Content => content;
 
         public readonly Container Details; //todo: replace with a real details view when added
diff --git a/osu.Game/Screens/Select/BeatmapDetailAreaTabControl.cs b/osu.Game/Screens/Select/BeatmapDetailAreaTabControl.cs
index 1345fc7a6a..c85f223649 100644
--- a/osu.Game/Screens/Select/BeatmapDetailAreaTabControl.cs
+++ b/osu.Game/Screens/Select/BeatmapDetailAreaTabControl.cs
@@ -17,8 +17,8 @@ namespace osu.Game.Screens.Select
     public class BeatmapDetailAreaTabControl : Container
     {
         public static readonly float HEIGHT = 24;
-        private OsuTabControlCheckBox modsCheckbox;
-        private OsuTabControl<BeatmapDetailTab> tabs;
+        private readonly OsuTabControlCheckBox modsCheckbox;
+        private readonly OsuTabControl<BeatmapDetailTab> tabs;
 
         public Action<BeatmapDetailTab, bool> OnFilter; //passed the selected tab and if mods is checked