diff --git a/slpkg/main.py b/slpkg/main.py
index b6d98d83..3f19525f 100644
--- a/slpkg/main.py
+++ b/slpkg/main.py
@@ -270,6 +270,7 @@ class Argparse(Configs):
         """ Checks for invalid options. """
         invalid: list = []
         commands: list = []
+        doubles: list = []
 
         for arg in self.args:
             if arg[0] == '-' and arg in self.commands.keys():
@@ -278,6 +279,14 @@ class Argparse(Configs):
                 invalid.append(arg)
             elif arg[0] == '--' and arg not in self.options:
                 invalid.append(arg)
+            elif arg[0] == '-' and arg in self.options:
+                doubles.append(arg)
+
+        # Fixed for doubles options.
+        if doubles:
+            for opt in doubles:
+                print(f"{self.prog_name}: invalid double option '{opt}'")
+            self.usage.help_minimal()
 
         # Fixed for invalid commands combination.
         if len(commands) > 1: