diff --git a/src/AppBundle/Command/LoadModelsCommand.php b/src/AppBundle/Command/LoadModelsCommand.php
index 54f925e..5d5a8ad 100644
--- a/src/AppBundle/Command/LoadModelsCommand.php
+++ b/src/AppBundle/Command/LoadModelsCommand.php
@@ -43,6 +43,11 @@ class LoadModelsCommand extends ContainerAwareCommand
 
         $ldraw = $input->getArgument('ldraw');
 
+        if(!$input->getOption('file') && !$input->getOption('all')){
+            $output->writeln('Either the --all or --file option is required');
+            return 1;
+        }
+
         if ($ldrawPath = realpath($ldraw)) {
             $modelLoader->setLDrawLibraryContext($ldrawPath);