diff --git a/ref/Castle.Core-net462.cs b/ref/Castle.Core-net462.cs
index a463161bc..dac8ff6b4 100644
--- a/ref/Castle.Core-net462.cs
+++ b/ref/Castle.Core-net462.cs
@@ -2477,6 +2477,10 @@ public virtual void MethodsInspected() { }
         public virtual void NonProxyableMemberNotification(System.Type type, System.Reflection.MemberInfo memberInfo) { }
         public virtual bool ShouldInterceptMethod(System.Type type, System.Reflection.MethodInfo methodInfo) { }
     }
+    public class CollectibleProxyBuilder : Castle.DynamicProxy.DefaultProxyBuilder
+    {
+        public CollectibleProxyBuilder() { }
+    }
     public class CustomAttributeInfo : System.IEquatable<Castle.DynamicProxy.CustomAttributeInfo>
     {
         public CustomAttributeInfo(System.Reflection.ConstructorInfo constructor, object?[] constructorArgs) { }
diff --git a/ref/Castle.Core-net6.0.cs b/ref/Castle.Core-net6.0.cs
index dd8a8652a..ad29fbae5 100644
--- a/ref/Castle.Core-net6.0.cs
+++ b/ref/Castle.Core-net6.0.cs
@@ -2445,6 +2445,10 @@ public virtual void MethodsInspected() { }
         public virtual void NonProxyableMemberNotification(System.Type type, System.Reflection.MemberInfo memberInfo) { }
         public virtual bool ShouldInterceptMethod(System.Type type, System.Reflection.MethodInfo methodInfo) { }
     }
+    public class CollectibleProxyBuilder : Castle.DynamicProxy.DefaultProxyBuilder
+    {
+        public CollectibleProxyBuilder() { }
+    }
     public class CustomAttributeInfo : System.IEquatable<Castle.DynamicProxy.CustomAttributeInfo>
     {
         public CustomAttributeInfo(System.Reflection.ConstructorInfo constructor, object?[] constructorArgs) { }
diff --git a/ref/Castle.Core-netstandard2.0.cs b/ref/Castle.Core-netstandard2.0.cs
index 53928d09b..5bfcce4fc 100644
--- a/ref/Castle.Core-netstandard2.0.cs
+++ b/ref/Castle.Core-netstandard2.0.cs
@@ -2443,6 +2443,10 @@ public virtual void MethodsInspected() { }
         public virtual void NonProxyableMemberNotification(System.Type type, System.Reflection.MemberInfo memberInfo) { }
         public virtual bool ShouldInterceptMethod(System.Type type, System.Reflection.MethodInfo methodInfo) { }
     }
+    public class CollectibleProxyBuilder : Castle.DynamicProxy.DefaultProxyBuilder
+    {
+        public CollectibleProxyBuilder() { }
+    }
     public class CustomAttributeInfo : System.IEquatable<Castle.DynamicProxy.CustomAttributeInfo>
     {
         public CustomAttributeInfo(System.Reflection.ConstructorInfo constructor, object?[] constructorArgs) { }
diff --git a/ref/Castle.Core-netstandard2.1.cs b/ref/Castle.Core-netstandard2.1.cs
index 40b01b56b..7d0ab6a2d 100644
--- a/ref/Castle.Core-netstandard2.1.cs
+++ b/ref/Castle.Core-netstandard2.1.cs
@@ -2443,6 +2443,10 @@ public virtual void MethodsInspected() { }
         public virtual void NonProxyableMemberNotification(System.Type type, System.Reflection.MemberInfo memberInfo) { }
         public virtual bool ShouldInterceptMethod(System.Type type, System.Reflection.MethodInfo methodInfo) { }
     }
+    public class CollectibleProxyBuilder : Castle.DynamicProxy.DefaultProxyBuilder
+    {
+        public CollectibleProxyBuilder() { }
+    }
     public class CustomAttributeInfo : System.IEquatable<Castle.DynamicProxy.CustomAttributeInfo>
     {
         public CustomAttributeInfo(System.Reflection.ConstructorInfo constructor, object?[] constructorArgs) { }