diff --git a/docs/dev/BUILD.md b/docs/dev/BUILD.md
index 12b552df7c..271a7ec2a1 100644
--- a/docs/dev/BUILD.md
+++ b/docs/dev/BUILD.md
@@ -59,6 +59,7 @@ Project switches accept `ON` or `OFF`:
 |----------------------------------|---------|--------------------------------------------------|
 | `-DBUILD_TESTING=ON`             | `OFF`   | Build and register tests.                        |
 | `-DANYPS5_RELINKER_ONLY=ON`      | `OFF`   | Build only the relinker and its tests, without third-party dependencies. |
+| `-DANYPS5_BUILD_WASM=ON`         | `OFF`   | Build only the browser relinker (`relinker_web` target). Requires `emcmake` from Emscripten and `BUILD_TESTING=OFF`. |
 | `-DANYPS5_ENABLE_SPIRV_TOOLS=ON` | `OFF`   | Enable SPIR-V validation and optimization.       |
 | `-DANYPS5_ENABLE_ASAN=ON`       | `OFF`   | Build with AddressSanitizer on Linux and move the guest arena out of ASan's shadow gap. |
 | `-DANYPS5_USE_SYSTEM_DEPS=ON`    | `OFF`   | Resolve SDL2, freetype, Vulkan-Headers, SPIRV-Headers, glslang and SPIRV-Tools from the system instead of the submodules. |