diff --git a/README.md b/README.md
index a791cc9..058a0a1 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ back to the client.
 	* That one feature that you *REALLY* needed
 
 #Setup
+1. Install a recent D compiler. DCD is only tested with DMD 2.064.2
 1. Run ```git submodule update --init``` after cloning this repository to grab the MessagePack and Datapacked libraries and the parser from DScanner.
 1. run the ```build.sh``` script to build the client and server. (Or build.bat on Windows)
 1. Configure your text editor to call the dcd-client program. See the *editors* folder for directions on configuring your specific editor.