diff --git a/Content.Shared/Physics/CollisionGroup.cs b/Content.Shared/Physics/CollisionGroup.cs
index 58c0bddb5b..9c7b10f5c5 100644
--- a/Content.Shared/Physics/CollisionGroup.cs
+++ b/Content.Shared/Physics/CollisionGroup.cs
@@ -1,6 +1,8 @@
 using System;
 using JetBrains.Annotations;
 using Robust.Shared.Map;
+using RobustPhysics = Robust.Shared.Physics;
+using Robust.Shared.Serialization;
 
 namespace Content.Shared.Physics
 {
@@ -8,6 +10,7 @@ namespace Content.Shared.Physics
     ///     Defined collision groups for the physics system.
     /// </summary>
     [Flags, PublicAPI]
+    [FlagsFor(typeof(RobustPhysics.CollisionLayer)), FlagsFor(typeof(RobustPhysics.CollisionMask))]
     public enum CollisionGroup
     {
 		None            = 0,