diff --git a/.bashrc b/.bashrc
index 8268570..19d8d94 100644
--- a/.bashrc
+++ b/.bashrc
@@ -2,6 +2,7 @@
 
 __prompt_git_status() {
   # Generate a git branch/status prompt.
+  # Based on git-prompt.sh by Shawn O. Pearce <spearce@spearce.org>.
   # Environment variables:
   #   GIT_PROMPT_SHOW_TYPE=1			- Show type of repository (Bare, Shallow).
   #   GIT_PROMPT_SHOW_IGNORED=1			- Show a ! if the directory is ignored.