diff --git a/README.md b/README.md
index a3b44f1504..b7feacfc7c 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ preferably in a virtualenv:
 
 In `micropython/docs`, build the docs:
 
-    make MICROPY_PORT=<port_name> BUILDDIR=<port_name>/build html
+    make MICROPY_PORT=<port_name> BUILDDIR=build/<port_name> html
 
 Where `<port_name>` can be `unix`, `pyboard`, `wipy` or `esp8266`.