diff --git a/src/ObservableCollections/ObservableFixedSizeRingBuffer.cs b/src/ObservableCollections/ObservableFixedSizeRingBuffer.cs
index fabf45e..c1c3be6 100644
--- a/src/ObservableCollections/ObservableFixedSizeRingBuffer.cs
+++ b/src/ObservableCollections/ObservableFixedSizeRingBuffer.cs
@@ -56,6 +56,8 @@ namespace ObservableCollections
             }
         }
 
+        public int Capacity => capacity;
+
         public int Count
         {
             get