diff --git a/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.cpp b/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.cpp
index 71a9edae4..4c208fea0 100644
--- a/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.cpp
+++ b/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.cpp
@@ -280,6 +280,13 @@ void HandlerCall::operator() (error_code const& ec, std::size_t bytes_transferre
 //
 //------------------------------------------------------------------------------
 
+void ContainerDeletePolicy <HandlerCall::Call>::destroy (HandlerCall::Call* call)
+{
+    call->destroy ();
+}
+
+//------------------------------------------------------------------------------
+
 void* asio_handler_allocate (std::size_t size, HandlerCall* call)
 {
     // Always go through the call's context.
diff --git a/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.h b/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.h
index 037a02f6b..15769c271 100644
--- a/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.h
+++ b/Subtrees/beast/modules/beast_asio/basics/beast_HandlerCall.h
@@ -964,10 +964,7 @@ struct ContainerDeletePolicy <HandlerCall::Call>
     // SharedObjectPtr will use this when
     // the reference count drops to zero.
     //
-    static void destroy (HandlerCall::Call* call)
-    {
-        call->destroy ();
-    }
+    static void destroy (HandlerCall::Call* call);
 };
 
 template <class Function>