diff --git a/lib/Thumbor/Url.php b/lib/Thumbor/Url.php
old mode 100644
new mode 100755
index 42b5e5c..5a7c0eb
--- a/lib/Thumbor/Url.php
+++ b/lib/Thumbor/Url.php
@@ -37,15 +37,20 @@ public function __construct($server, $secret, $original, $commands)
      */
     public function stringify($server, $secret, $original, $commands)
     {
-        $commandPath = implode('/', $commands);
-        $signature = $secret ? self::sign("$commandPath/$original", $secret) : 'unsafe';
+        if (count($commands) > 0) {
+            $commandPath = implode('/', $commands);
+            $imgPath = sprintf('%s/%s', $commandPath, $original);
+        } else {
+            $imgPath = $original;
+        }
+
+        $signature = $secret ? self::sign($imgPath, $secret) : 'unsafe';
 
         return sprintf(
-            '%s/%s/%s/%s',
+            '%s/%s/%s',
             $server,
             $signature,
-            $commandPath,
-            $original
+            $imgPath
         );
     }
 
diff --git a/tests/Thumbor/UrlTest.php b/tests/Thumbor/UrlTest.php
old mode 100644
new mode 100755
index 556090d..1a63f7f
--- a/tests/Thumbor/UrlTest.php
+++ b/tests/Thumbor/UrlTest.php
@@ -31,4 +31,19 @@ public function testToString()
             "$url"
         );
     }
+
+    public function testToStringWithoutCommand()
+    {
+        $url = new Url(
+            'http://thumbor-server:8888',
+            'MY_SECURE_KEY',
+            'my/big/image.jpg',
+            array()
+        );
+
+        $this->assertEquals(
+            'http://thumbor-server:8888/V2bYe7DAKqngbtv2GFxCcllDYWw=/my/big/image.jpg',
+            "$url"
+        );
+    }
 }