diff --git a/README.md b/README.md
index fe88fe1..34a2191 100644
--- a/README.md
+++ b/README.md
@@ -14,4 +14,6 @@ and SDL2 + GLEW for the test program.
 
 - `make lib`: Build the `dist` directory, containing the shared object and public-facing header.
 - `make test`: (Default) Builds the library `dist` directory as well as the test program.
-- `make run`: Build and run the SDL+OpenGL test program.
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+- `make run`: Build and run the SDL+OpenGL test program.
+
+To run the test program you'll need a SM64 US ROM in the root of the repository with the name `baserom.us.z64`.
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