diff --git a/osu.Game/Screens/Multi/Screens/Match/Settings/RoomSettingsOverlay.cs b/osu.Game/Screens/Multi/Screens/Match/Settings/RoomSettingsOverlay.cs
index b7cbba505b..2c68ba175c 100644
--- a/osu.Game/Screens/Multi/Screens/Match/Settings/RoomSettingsOverlay.cs
+++ b/osu.Game/Screens/Multi/Screens/Match/Settings/RoomSettingsOverlay.cs
@@ -107,7 +107,7 @@ namespace osu.Game.Screens.Multi.Screens.Match.Settings
                                 {
                                     new Section("MAX PARTICIPANTS")
                                     {
-                                        Child = MaxParticipantsField = new SettingsTextBox
+                                        Child = MaxParticipantsField = new SettingsNumberTextBox
                                         {
                                             RelativeSizeAxes = Axes.X,
                                             TabbableContentContainer = this,
@@ -199,6 +199,11 @@ namespace osu.Game.Screens.Multi.Screens.Match.Settings
             protected override Color4 BackgroundFocused => Color4.Black;
         }
 
+        private class SettingsNumberTextBox : SettingsTextBox
+        {
+            protected override bool CanAddCharacter(char character) => char.IsNumber(character);
+        }
+
         private class SettingsPasswordTextBox : OsuPasswordTextBox
         {
             protected override Color4 BackgroundUnfocused => Color4.Black;