diff --git a/src/wdm/debian/control/StandardFile.php b/src/wdm/debian/control/StandardFile.php
index 71dcf8c..89767e2 100644
--- a/src/wdm/debian/control/StandardFile.php
+++ b/src/wdm/debian/control/StandardFile.php
@@ -1,12 +1,12 @@
-<?php 
+<?php
 namespace wdm\debian\control;
 
 /**
- * 
+ *
  * Representation of Standard control file for Debian packages
  *
  * @author Walter Dal Mut
- * @package 
+ * @package
  * @license MIT
  *
  * Copyright (C) 2012 Corley S.R.L.
@@ -17,7 +17,7 @@ namespace wdm\debian\control;
  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  * of the Software, and to permit persons to whom the Software is furnished to do
  * so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice shall be included in all
  * copies or substantial portions of the Software.
  *
@@ -33,59 +33,59 @@ class StandardFile
     implements \ArrayAccess
 {
     private $_keys = array(
-        'Package' => '',
+        'Package' => false,
         'Version' => '0.1',
         "Section" => "web",
         "Priority" => "optional",
         "Architecture" => "all",
         "Essential" => "no",
-        "Depends" => "",
-        "Pre-Depends" => "", 
-        "Recommends" => "", 
-        "Suggests" => "",
+        "Depends" => false,
+        "Pre-Depends" => false,
+        "Recommends" => false,
+        "Suggests" => false,
         "Installed-Size" => 1024,
         "Maintainer" => "name [email]",
-        "Conflicts" => "",
-        "Replaces" => "",
+        "Conflicts" => false,
+        "Replaces" => false,
         "Provides" => "your-company",
         "Description" => "Your description"
     );
-    
+
     public function setPackageName($name)
     {
         return $this->_setProperty("Package", $name);
     }
-    
+
     public function setVersion($version)
     {
         return $this->_setProperty("Version", $version);
     }
-   
+
     public function setSection($section)
     {
         return $this->_setProperty("Section", $section);
     }
-    
+
     public function setPriority($priority)
     {
         return $this->_setProperty($this["Priority"], $priority);
     }
-    
+
     public function setArchitecture($arch)
     {
         return $this->_setProperty("Architecture", $arch);
     }
-    
+
     public function setEssential($essential)
     {
         return $this->_setProperty("Essential", $essential);
     }
-    
+
     public function setDepends($depends)
     {
         return $this->_setProperty("Depends", $this->_transformList($depends));
     }
-    
+
     public function setPreDepends($depends)
     {
         return $this->_setProperty("Pre-Depends", $this->_transformList($depends));
@@ -95,43 +95,43 @@ class StandardFile
     {
         return $this->_setProperty("Reccommends", $depends);
     }
-    
+
     public function setSuggests($depends)
     {
         return $this->_setProperty("Suggests", $this->_transformList($depends));
     }
-    
+
     public function setInstalledSize($size)
     {
         return $this->_setProperty("Installed-Size", $size);
     }
-    
+
     public function setMaintainer($maintainer, $email = false)
     {
         $email = ($email) ? $email : "---";
         return $this->_setProperty("Maintainer", $maintainer . "[{$email}]");
     }
-    
+
     public function setConflicts($conflicts)
     {
         return $this->_setProperty("Conflicts", $this->_transformList($conflicts));
     }
-    
+
     public function setReplaces($replaces)
     {
         return $this->_setProperty("Conflicts", $this->_transformList($replaces));
     }
-    
+
     public function setProvides($provides)
     {
         return $this->_setProperty("Provides", $provides);
     }
-    
+
     public function setDescription($description)
     {
         return $this->_setProperty("Description", $description);
     }
-    
+
     private function _transformList($depends)
     {
         if (is_array($depends)) {
@@ -139,16 +139,16 @@ class StandardFile
         } else {
             $depends = $depends;
         }
-        
+
         return $depends;
     }
-    
+
     private function _setProperty($key, $value)
     {
         $this[$key] = $value;
         return $this;
     }
-    
+
     public function offsetExists ($offset) {
         return array_key_exists($offset, $this->_keys);
     }
@@ -173,19 +173,21 @@ class StandardFile
             unset($this->_keys[$offset]);
         }
     }
-    
+
     /**
      * Control file string representation.
-     * 
+     *
      * @return string The control file
      */
     public function __toString()
     {
         $control = '';
         foreach ($this->_keys as $key => $value) {
-            $control .= "{$key}: {$value}" . PHP_EOL;
+            if($value){
+                $control .= "{$key}: {$value}" . PHP_EOL;
+            }
         }
-        
+
         return $control;
     }
-}
\ No newline at end of file
+}