diff --git a/update-firewall-source.py b/update-firewall-source.py
index 9f36171..dc89c60 100644
--- a/update-firewall-source.py
+++ b/update-firewall-source.py
@@ -29,7 +29,7 @@ import subprocess
 # 2 : Config file invalid, sections must define at least CONST.CFG_MANDATORY
 # 3 : Performing a firewalld rules check failed
 # 4 : Performing a firewalld rules encountered a FileNotFoundError
-# 5 : Unable to open firewalld direct rules file
+# 5 : Unable to open firewalld direct rules file for reading
 # 6 : Source and destination are identical when attempting to back up firewalld direct rules file
 # 7 : An option that must have a non-null value is either unset or null
 # 8 : Exception while adding a chain XML element to firewalld direct rules