diff --git a/README.md b/README.md
index f98425aaf169564c1e37bcda3cc01fc5d3e6eb42..9aabc18469b03bfd201a88ed9835bb195c1ab55e 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ is on SourceForge.
 
 To build it, you'll need `gcc` or `clang`, as well as `make`, `libtool`, `pkg-config` version 0.23
 or greater, and possibly others detailed [here](http://openocd.org/doc-release/README). Once you
-have the prereqs, building is a standard process:
+have the prereqs, building is a standard process. Just note that you need to enable cmsis-dap, which is the protocol your computer will use to communicate with an ATMEL ICE debugger.
 
 ```
 ./bootstrap