diff --git a/src/Intervention/Image/Imagick/Commands/InterlaceCommand.php b/src/Intervention/Image/Imagick/Commands/InterlaceCommand.php
index d9206800..b30ee90b 100644
--- a/src/Intervention/Image/Imagick/Commands/InterlaceCommand.php
+++ b/src/Intervention/Image/Imagick/Commands/InterlaceCommand.php
@@ -6,7 +6,7 @@ class InterlaceCommand extends \Intervention\Image\Commands\AbstractCommand
 {
     public function execute($image)
     {
-        $mode = $this->getArgument(0);
+        $mode = $this->getArgument(0, true);
 
         if ($mode) {
             $mode = \Imagick::INTERLACE_LINE;