diff --git a/Assets/Mirror/Core/Attributes.cs b/Assets/Mirror/Core/Attributes.cs
index a76adc6ac..8f74604d8 100644
--- a/Assets/Mirror/Core/Attributes.cs
+++ b/Assets/Mirror/Core/Attributes.cs
@@ -90,7 +90,7 @@ public class ShowInInspectorAttribute : Attribute {}
     /// <summary>
     /// Used to make a field readonly in the inspector
     /// </summary>
-    [AttributeUsage(AttributeTargets.Field)]
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
     public class ReadOnlyAttribute : PropertyAttribute {}
 
     /// <summary>