diff --git a/BUILD.md b/BUILD.md
index e7cbdbe86..0ec917827 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -7,13 +7,13 @@
 ## Linux
 1. Install dependencies:
    * Ubuntu:
-     * All versions: `sudo apt install cmake extra-cmake-modules libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev libarchive-dev libenet-dev libzstd-dev`
+     * All versions: `sudo apt install cmake extra-cmake-modules libcurl4-gnutls-dev libpcap0.8-dev libsdl2-dev libarchive-dev libenet-dev libzstd-dev libfaad-dev`
      * 24.04: `sudo apt install qt6-{base,base-private,multimedia,svg}-dev`
      * 22.04: `sudo apt install qtbase6-dev qtbase6-private-dev qtmultimedia6-dev libqt6svg6-dev`
      * Older versions: `sudo apt install qtbase5-dev qtbase5-private-dev qtmultimedia5-dev libqt5svg5-dev`  
        Also add `-DUSE_QT6=OFF` to the first CMake command below.
-   * Fedora: `sudo dnf install gcc-c++ cmake extra-cmake-modules SDL2-devel libarchive-devel enet-devel libzstd-devel qt6-{qtbase,qtbase-private,qtmultimedia,qtsvg}-devel wayland-devel`
-   * Arch Linux: `sudo pacman -S base-devel cmake extra-cmake-modules git libpcap sdl2 qt6-{base,multimedia,svg} libarchive enet zstd`
+   * Fedora: `sudo dnf install gcc-c++ cmake extra-cmake-modules SDL2-devel libarchive-devel enet-devel libzstd-devel faad2-devel qt6-{qtbase,qtbase-private,qtmultimedia,qtsvg}-devel wayland-devel`
+   * Arch Linux: `sudo pacman -S base-devel cmake extra-cmake-modules git libpcap sdl2 qt6-{base,multimedia,svg} libarchive enet zstd faad2`
 2. Download the melonDS repository and prepare:
    ```bash
    git clone https://github.com/melonDS-emu/melonDS
@@ -40,7 +40,7 @@
 5. Install dependencies:  
    Replace `<prefix>` below with `mingw-w64-ucrt-x86_64` on x64 systems, or `mingw-w64-clang-aarch64` on ARM64 systems.
    ```bash
-   pacman -S <prefix>-{toolchain,cmake,SDL2,libarchive,enet,zstd}
+   pacman -S <prefix>-{toolchain,cmake,SDL2,libarchive,enet,zstd,faad2}
    ```
 6. Install Qt and configure the build directory
    * Dynamic builds (with DLLs)
@@ -56,7 +56,7 @@ If everything went well, melonDS should now be in the `build` folder. For dynami
 
 ## macOS
 1. Install the [Homebrew Package Manager](https://brew.sh)
-2. Install dependencies: `brew install git pkg-config cmake sdl2 qt@6 libarchive enet zstd`
+2. Install dependencies: `brew install git pkg-config cmake sdl2 qt@6 libarchive enet zstd faad2`
 3. Download the melonDS repository and prepare:
    ```zsh
    git clone https://github.com/melonDS-emu/melonDS