diff --git a/cron/clearextracts.php b/cron/clearextracts.php
index 363f173..74cb89a 100644
--- a/cron/clearextracts.php
+++ b/cron/clearextracts.php
@@ -4,12 +4,14 @@ $projectRoot = dirname(dirname(__FILE__));
 
 require "{$projectRoot}/header.php";
 
-if ( $argc != 2 ) {
+if ( $argc == 1 ) {
     $daysToKeep = 10;
 } else {
     $daysToKeep = intval($argv[1]);
 }
 
+$dryrun = (in_array("--dryrun", $argv)) ? true : false;
+
 $ed = $projectRoot . "/" . EXTRACTSDIR;
 $now = time();
 $maxAge = $now - (86400*$daysToKeep);
@@ -21,7 +23,7 @@ foreach ( $files as $file ) {
     if ( $file->isDir() && in_array($file->getExtension(), $validExtensions) ) {
         if ( filemtime($file->getRealPath()) <= $maxAge ) {
             echo "Found aged extracted comic: {$file->getFilename()}\n";
-            exec("rm -rf \"{$file->getRealPath()}\"", $output, $retval);
+            if ( !$dryrun ) exec("rm -rf \"{$file->getRealPath()}\"", $output, $retval);
         }
     }
 }