diff --git a/README.md b/README.md
index 21ef3fff..5415b4be 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ SDL2. untested on Windows/macOS.
 
 ## compilation
 
-your typical CMake project. clone and:
+your typical CMake project. clone (including submodules) and:
 
 ```
 mkdir build