diff --git a/third-party/llhttp/README.md b/third-party/llhttp/README.md
index 4b3c7da0..fb31ce2c 100644
--- a/third-party/llhttp/README.md
+++ b/third-party/llhttp/README.md
@@ -92,6 +92,15 @@ if (err == HPE_OK) {
 ```
 For more information on API usage, please refer to [src/native/api.h](https://github.com/nodejs/llhttp/blob/main/src/native/api.h).
 
+## Build Instructions
+
+Make sure you have [Node.js](https://nodejs.org/), npm and npx installed. Then under project directory run:
+
+```sh
+npm install
+make
+```
+
 ---
 
 ### Bindings to other languages
@@ -99,7 +108,6 @@ For more information on API usage, please refer to [src/native/api.h](https://gi
 * Python: [pallas/pyllhttp][8]
 * Ruby: [metabahn/llhttp][9]
 
-
 ### Using with CMake
 
 If you want to use this library in a CMake project you can use the snippet below.
@@ -113,6 +121,28 @@ FetchContent_MakeAvailable(llhttp)
 target_link_libraries(${EXAMPLE_PROJECT_NAME} ${PROJECT_LIBRARIES} llhttp ${PROJECT_NAME})
 ```
 
+## Building on Windows
+
+### Installation
+
+* `choco install git`
+* `choco install node`
+* `choco install llvm` (or install the `C++ Clang tools for Windows` optional package from the Visual Studio 2019 installer)
+* `choco install make` (or if you have MinGW, it comes bundled)
+
+1. Ensure that `Clang` and `make` are in your system path.
+2. Using Git Bash, clone the repo to your preferred location.
+3. Cd into the cloned directory and run `npm install`
+5. Run `make`
+6. Your `repo/build` directory should now have `libllhttp.a` and `libllhttp.so` static and dynamic libraries.
+7. When building your executable, you can link to these libraries. Make sure to set the build folder as an include path when building so you can reference the declarations in `repo/build/llhttp.h`.
+
+### A simple example on linking with the library:
+
+Assuming you have an executable `main.cpp` in your current working directory, you would run: `clang++ -Os -g3 -Wall -Wextra -Wno-unused-parameter -I/path/to/llhttp/build main.cpp /path/to/llhttp/build/libllhttp.a -o main.exe`.
+
+If you are getting `unresolved external symbol` linker errors you are likely attempting to build `llhttp.c` without linking it with object files from `api.c` and `http.c`.
+
 #### LICENSE
 
 This software is licensed under the MIT License.
diff --git a/third-party/llhttp/include/llhttp.h b/third-party/llhttp/include/llhttp.h
index 94b14988..698c5536 100644
--- a/third-party/llhttp/include/llhttp.h
+++ b/third-party/llhttp/include/llhttp.h
@@ -374,8 +374,6 @@ LLHTTP_EXPORT
 void llhttp_init(llhttp_t* parser, llhttp_type_t type,
                  const llhttp_settings_t* settings);
 
-#if defined(__wasm__)
-
 LLHTTP_EXPORT
 llhttp_t* llhttp_alloc(llhttp_type_t type);
 
@@ -400,8 +398,6 @@ int llhttp_get_status_code(llhttp_t* parser);
 LLHTTP_EXPORT
 uint8_t llhttp_get_upgrade(llhttp_t* parser);
 
-#endif  // defined(__wasm__)
-
 /* Reset an already initialized parser back to the start state, preserving the
  * existing parser type, callback settings, user data, and lenient flags.
  */