diff --git a/src/Castle.Core/Core/StringObjectDictionaryAdapter.cs b/src/Castle.Core/Core/StringObjectDictionaryAdapter.cs
index 23c4632cd..53979e21d 100644
--- a/src/Castle.Core/Core/StringObjectDictionaryAdapter.cs
+++ b/src/Castle.Core/Core/StringObjectDictionaryAdapter.cs
@@ -220,6 +220,7 @@ KeyValuePair<string, object> IEnumerator<KeyValuePair<string, object>>.Current
 
 			public void Dispose()
 			{
+				keyEnumerator.Dispose();
 				GC.SuppressFinalize(this);
 			}
 		}