diff --git a/Userland/Libraries/LibWasm/AbstractMachine/Configuration.cpp b/Userland/Libraries/LibWasm/AbstractMachine/Configuration.cpp
index 0bb260ee5b..88de3a1459 100644
--- a/Userland/Libraries/LibWasm/AbstractMachine/Configuration.cpp
+++ b/Userland/Libraries/LibWasm/AbstractMachine/Configuration.cpp
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibCore/MemoryStream.h>
 #include <LibWasm/AbstractMachine/Configuration.h>
 #include <LibWasm/AbstractMachine/Interpreter.h>
 #include <LibWasm/Printer/Printer.h>
@@ -85,9 +86,11 @@ Result Configuration::execute(Interpreter& interpreter)
 void Configuration::dump_stack()
 {
     auto print_value = []<typename... Ts>(CheckedFormatString<Ts...> format, Ts... vs) {
-        DuplexMemoryStream memory_stream;
-        Printer { memory_stream }.print(vs...);
-        ByteBuffer buffer = memory_stream.copy_into_contiguous_buffer();
+        Core::Stream::AllocatingMemoryStream memory_stream;
+        Core::Stream::WrapInAKOutputStream wrapped_memory_stream { memory_stream };
+        Printer { wrapped_memory_stream }.print(vs...);
+        auto buffer = ByteBuffer::create_uninitialized(memory_stream.used_buffer_size()).release_value_but_fixme_should_propagate_errors();
+        memory_stream.read_entire_buffer(buffer).release_value_but_fixme_should_propagate_errors();
         dbgln(format.view(), StringView(buffer).trim_whitespace());
     };
     for (auto const& entry : stack().entries()) {
diff --git a/Userland/Utilities/wasm.cpp b/Userland/Utilities/wasm.cpp
index fabb40c2c1..3bd79b4a05 100644
--- a/Userland/Utilities/wasm.cpp
+++ b/Userland/Utilities/wasm.cpp
@@ -9,6 +9,7 @@
 #include <LibCore/File.h>
 #include <LibCore/FileStream.h>
 #include <LibCore/MappedFile.h>
+#include <LibCore/MemoryStream.h>
 #include <LibLine/Editor.h>
 #include <LibMain/Main.h>
 #include <LibWasm/AbstractMachine/AbstractMachine.h>
@@ -396,13 +397,15 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
                         StringBuilder argument_builder;
                         bool first = true;
                         for (auto& argument : arguments) {
-                            DuplexMemoryStream stream;
-                            Wasm::Printer { stream }.print(argument);
+                            Core::Stream::AllocatingMemoryStream stream;
+                            Core::Stream::WrapInAKOutputStream wrapped_stream { stream };
+                            Wasm::Printer { wrapped_stream }.print(argument);
                             if (first)
                                 first = false;
                             else
                                 argument_builder.append(", "sv);
-                            ByteBuffer buffer = stream.copy_into_contiguous_buffer();
+                            auto buffer = ByteBuffer::create_uninitialized(stream.used_buffer_size()).release_value_but_fixme_should_propagate_errors();
+                            stream.read_entire_buffer(buffer).release_value_but_fixme_should_propagate_errors();
                             argument_builder.append(StringView(buffer).trim_whitespace());
                         }
                         dbgln("[wasm runtime] Stub function {} was called with the following arguments: {}", name, argument_builder.to_deprecated_string());