diff --git a/.gitignore b/.gitignore
index cbf24dd..c9c5100 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 # For PCBs designed using KiCad: http://www.kicad-pcb.org/
+# Format documentation: http://kicad-pcb.org/help/file-formats/
 
 # Temporary files
 *.000