diff --git a/doc/contribute.html b/doc/contribute.html
index 471eeef536..14839a6831 100644
--- a/doc/contribute.html
+++ b/doc/contribute.html
@@ -238,7 +238,8 @@ $ git codereview help
 </pre>
 
 <p>
-prints help text, not an error.
+prints help text, not an error. If it prints an error, make sure that $GOPATH/bin
+is in your $PATH.
 </p>
 
 <p>