diff --git a/master/contrib/git_buildbot.py b/master/contrib/git_buildbot.py
index <HASH>..<HASH> 100755
--- a/master/contrib/git_buildbot.py
+++ b/master/contrib/git_buildbot.py
@@ -40,17 +40,17 @@ from optparse import OptionParser
 
 master = "localhost:9989"
 
-# When sending the notification, send this category if
+# When sending the notification, send this category if (and only if)
 # it's set (via --category)
 
 category = None
 
-# When sending the notification, send this repository if
+# When sending the notification, send this repository if (and only if)
 # it's set (via --repository)
 
 repository = None
 
-# When sending the notification, send this project if
+# When sending the notification, send this project if (and only if)
 # it's set (via --project)
 
 project = None
replace iff with if (and only if) for non-math speakers ;)