Update keyboard readme files with new makefile instructions

1 files changed, 5 insertions, 3 deletions

diff --git a/keyboards/planck/readme.md b/keyboards/planck/readme.md
index f89fdeb93..4b24a690e 100644
--- a/keyboards/planck/readme.md
+++ b/keyboards/planck/readme.md
@@ -13,15 +13,17 @@ Download or clone the whole firmware and navigate to the keyboards/planck folder
 Depending on which keymap you would like to use, you will have to compile slightly differently.
 
 ### Default
-To build with the default keymap, simply run `make`.
+To build with the default keymap, simply run `make default`.
 
 ### Other Keymaps
 Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create file named `<name>.c` in the keymaps folder, and see keymap document (you can find in top readme.md) and existent keymap files.
 
-To build the firmware binary hex file with a keymap just do `make` with `KEYMAP` option like:
+To build the firmware binary hex file with a keymap just do `make` with a keymap like this:
+
 ```
-$ make KEYMAP=[default|jack|<name>]
+$ make [default|jack|<name>]
 ```
+
 Keymaps follow the format **__\<name\>.c__** and are stored in the `keymaps` folder.
 
 ### Notable forks (which some of the keymap files are from)