diff --git a/apps/files_external/lib/ftp.php b/apps/files_external/lib/ftp.php
index 63f14a28777..10d33ad5fb6 100644
--- a/apps/files_external/lib/ftp.php
+++ b/apps/files_external/lib/ftp.php
@@ -19,7 +19,15 @@ class OC_FileStorage_FTP extends OC_FileStorage_StreamWrapper{
 		$this->host=$params['host'];
 		$this->user=$params['user'];
 		$this->password=$params['password'];
-		$this->secure=isset($params['secure'])?(bool)$params['secure']:false;
+		if(isset($params['secure'])){
+			if(is_string($params['secure'])){
+				$this->secure = ($params['secure'] === 'true');
+			}else{
+				$this->secure = (bool)$params['secure'];
+			}
+		}else{
+			$this->secure = false;
+		}
 		$this->root=isset($params['root'])?$params['root']:'/';
 		if(!$this->root || $this->root[0]!='/'){
 			$this->root='/'.$this->root;
diff --git a/apps/files_external/lib/swift.php b/apps/files_external/lib/swift.php
index 58b95a6ae01..b4288a46744 100644
--- a/apps/files_external/lib/swift.php
+++ b/apps/files_external/lib/swift.php
@@ -268,7 +268,15 @@ class OC_FileStorage_SWIFT extends OC_Filestorage_Common{
 		$this->host=$params['host'];
 		$this->user=$params['user'];
 		$this->root=isset($params['root'])?$params['root']:'/';
-		$this->secure=isset($params['secure'])?(bool)$params['secure']:true;
+		if(isset($params['secure'])){
+			if(is_string($params['secure'])){
+				$this->secure = ($params['secure'] === 'true');
+			}else{
+				$this->secure = (bool)$params['secure'];
+			}
+		}else{
+			$this->secure = false;
+		}
 		if(!$this->root || $this->root[0]!='/'){
 			$this->root='/'.$this->root;
 		}
diff --git a/apps/files_external/lib/webdav.php b/apps/files_external/lib/webdav.php
index d136f04f3eb..a20491b4887 100644
--- a/apps/files_external/lib/webdav.php
+++ b/apps/files_external/lib/webdav.php
@@ -23,7 +23,15 @@ class OC_FileStorage_DAV extends OC_Filestorage_Common{
 		$this->host=$params['host'];
 		$this->user=$params['user'];
 		$this->password=$params['password'];
-		$this->secure=isset($params['secure'])?(bool)$params['secure']:false;
+		if(isset($params['secure'])){
+			if(is_string($params['secure'])){
+				$this->secure = ($params['secure'] === 'true');
+			}else{
+				$this->secure = (bool)$params['secure'];
+			}
+		}else{
+			$this->secure = false;
+		}
 		$this->root=isset($params['root'])?$params['root']:'/';
 		if(!$this->root || $this->root[0]!='/'){
 			$this->root='/'.$this->root;
diff --git a/apps/files_external/tests/ftp.php b/apps/files_external/tests/ftp.php
index 68481b4e66b..a58f0f40d0b 100644
--- a/apps/files_external/tests/ftp.php
+++ b/apps/files_external/tests/ftp.php
@@ -26,5 +26,23 @@ if(!is_array($config) or !isset($config['ftp']) or !$config['ftp']['run']){
 			OCP\Files::rmdirr($this->instance->constructUrl(''));
 		}
 	}
+
+	public function testConstructUrl(){
+		$config = array ( 'host' => 'localhost', 'user' => 'ftp', 'password' => 'ftp', 'root' => '/', 'secure' => false );
+		$instance = new OC_Filestorage_FTP($config);
+		$this->assertEqual('ftp://ftp:ftp@localhost/', $instance->constructUrl(''));
+
+		$config['secure'] = true;
+		$instance = new OC_Filestorage_FTP($config);
+		$this->assertEqual('ftps://ftp:ftp@localhost/', $instance->constructUrl(''));
+
+		$config['secure'] = 'false';
+		$instance = new OC_Filestorage_FTP($config);
+		$this->assertEqual('ftp://ftp:ftp@localhost/', $instance->constructUrl(''));
+
+		$config['secure'] = 'true';
+		$instance = new OC_Filestorage_FTP($config);
+		$this->assertEqual('ftps://ftp:ftp@localhost/', $instance->constructUrl(''));
+	}
 }