diff --git a/mp-s7-src/README.md b/mp-s7-src/README.md
index e7364ca..e6b4f46 100644
--- a/mp-s7-src/README.md
+++ b/mp-s7-src/README.md
@@ -1,2 +1,4 @@
 # MicroPython System 7 Port
 This is based, initially, on the minimal port of MircoPython. This can be found under ../micropython/ports/minimal/
+
+Initially, only change is to strip out the STM32 related ifdef's.