diff --git a/src/CliProgram/Validation/TCommandWithValidation.php b/src/CliProgram/Validation/TCommandWithValidation.php
index 2345b05..59ec4ac 100644
--- a/src/CliProgram/Validation/TCommandWithValidation.php
+++ b/src/CliProgram/Validation/TCommandWithValidation.php
@@ -177,7 +177,7 @@ trait TCommandWithValidation {
                     }
                     $optionValueEntry = $optionValidator->getValue();
                 }
-                $input->setArgument($optionName, $optionValue);
+                $input->setOption($optionName, $optionValue);
             }
             else {
                 if (!$optionValidator->validate($optionValue)) {