diff --git a/slpkg/main.py b/slpkg/main.py
index 75c0162f..4c89bd84 100644
--- a/slpkg/main.py
+++ b/slpkg/main.py
@@ -285,6 +285,7 @@ class Argparse(Configs):
             elif arg[0] == '--' and arg not in self.options:
                 invalid.append(arg)
 
+        # Avoid to combine two or more options.
         if len(options) != len(set(options)):
             print(f"{self.prog_name}: you can't combine {', '.join(options)} options.")
             self.usage.help_minimal()