diff --git a/README.rst b/README.rst
index 443a13d..1afc6e2 100644
--- a/README.rst
+++ b/README.rst
@@ -4,7 +4,6 @@ uinput-mapper
 uinput-mapper maps input devices to new virtual input devices, using (as implied
 by the name /dev/uinput[1]).
 
-
 [1] Or /dev/input/uinput depending on the OS.
 
 
@@ -38,4 +37,6 @@ Included in uinput-mapper ; may be split later
 Development notes
 =================
 
-gcc -E -dM /usr/include/linux/input.h | egrep ' (EV|SYN|KEY|BTN|REL|ABS|MSC|LED|SND|REP|SW)_[A-Za-z0-9_]+' | ( echo "#include <linux/input.h>" ; echo "input_constants_dict = {" ; sed -r 's/[^ ]+ +([^ ]+).*/"\1" : \1,/' ; echo "}" ) | gcc -E -o /dev/stdout - | grep 'input_constants_dict = {' -A 100000 > gen.py
+Generating gen.py:
+
+    gcc -E -dM /usr/include/linux/input.h | egrep ' (EV|SYN|KEY|BTN|REL|ABS|MSC|LED|SND|REP|SW)_[A-Za-z0-9_]+' | ( echo "#include <linux/input.h>" ; echo "input_constants_dict = {" ; sed -r 's/[^ ]+ +([^ ]+).*/"\1" : \1,/' ; echo "}" ) | gcc -E -o /dev/stdout - | grep 'input_constants_dict = {' -A 100000 > gen.py