diff --git a/src/Spring/Spring.Core/Objects/Factory/Attributes/QualifierAnnotationAutowireCandidateResolver.cs b/src/Spring/Spring.Core/Objects/Factory/Attributes/QualifierAnnotationAutowireCandidateResolver.cs
index 73d82a09..a71a01b0 100644
--- a/src/Spring/Spring.Core/Objects/Factory/Attributes/QualifierAnnotationAutowireCandidateResolver.cs
+++ b/src/Spring/Spring.Core/Objects/Factory/Attributes/QualifierAnnotationAutowireCandidateResolver.cs
@@ -34,6 +34,7 @@ namespace Spring.Objects.Factory.Attributes
     /// against <see cref="QualifierAttribute"/> on the field or parameter to be autowired.
     /// Also supports suggested expression values through a <see cref="ValueAttribute"/> attribute.
     /// </summary>
+    [Serializable]
     public class QualifierAnnotationAutowireCandidateResolver : IAutowireCandidateResolver, IObjectFactoryAware
     {
         private IObjectFactory _objectFactory;
diff --git a/src/Spring/Spring.Core/Objects/ObjectMetadataAttributeAccessor.cs b/src/Spring/Spring.Core/Objects/ObjectMetadataAttributeAccessor.cs
index 804ad4e0..27c6ad6d 100644
--- a/src/Spring/Spring.Core/Objects/ObjectMetadataAttributeAccessor.cs
+++ b/src/Spring/Spring.Core/Objects/ObjectMetadataAttributeAccessor.cs
@@ -18,6 +18,7 @@
 
 #endregion
 
+using System;
 using Spring.Core;
 
 namespace Spring.Objects
@@ -27,6 +28,7 @@ namespace Spring.Objects
     /// holding attributes as <see cref="IObjectMetadataElement"/> objects in order
     /// to keep track of the definition source.
     /// </summary>
+    [Serializable]
     public class ObjectMetadataAttributeAccessor : AttributeAccessorSupport, IObjectMetadataElement
     {
 	    private object _source;