diff --git a/README.md b/README.md
index 0c540b0..ada96e5 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,5 @@
-To build, `cd` to the project directory and use `cmake .` to generate the makefiles (on Unix) or the Visual Studio project (on Windows). Then compile with `make` (Unix) or by building the Visual Studio project (Windows).
+Please clone this repository with the -r option to automatically download all project submodules.
+
+To build, `cd` to a new folder in the project directory and use `cmake ..`
+to generate the makefiles (on Unix) or the Visual Studio project (on Windows).
+Then compile with `make` (Unix) or by building the Visual Studio project (Windows).