diff --git a/README.md b/README.md
index b0d8ef1a..790124cc 100644
--- a/README.md
+++ b/README.md
@@ -82,6 +82,7 @@ make toolchain
 #### 5. Prepare a base ROM
 
 Copy your ROM to the root of this new project directory, and rename the file of the baserom to reflect the version of ROM you are using. ex: `baserom.us.z64`
+*Make sure the ROM is revision 1.1 (REV A).
 
 #### 6. Make and Build the ROM