diff --git a/slpkg/main.py b/slpkg/main.py
index 021091f0..b17f909b 100644
--- a/slpkg/main.py
+++ b/slpkg/main.py
@@ -269,19 +269,20 @@ class Argparse(Configs):
     def invalid_options(self):
         """ Checks for invalid options. """
         invalid: list = []
-        command: list = []
+        commands: list = []
 
         for arg in self.args:
             if arg[0] == '-' and arg in self.commands.keys():
-                command.append(arg)
+                commands.append(arg)
             elif arg[0] == '-' and arg not in self.options:
                 invalid.append(arg)
             elif arg[0] == '--' and arg not in self.options:
                 invalid.append(arg)
 
-        # Fixed for two or more commands.
-        if len(command) > 1:
-            invalid = command
+        # Fixed for invalid commands combination.
+        if len(commands) > 1:
+            print(f"{self.prog_name}: invalid combination '{', '.join(commands)}'")
+            self.usage.help_minimal()
 
         # Prints error for invalid options.
         if invalid: