diff --git a/OwnCloudPlugin.class.php b/OwnCloudPlugin.class.php
index 663ac5fbe3e3740e4aa65877688123ca428f16ba..6408617df7c32c7ea78487da665617f6378b425c 100755
--- a/OwnCloudPlugin.class.php
+++ b/OwnCloudPlugin.class.php
@@ -62,7 +62,7 @@ class OwnCloudPlugin extends StudIPPlugin implements FilesystemPlugin {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
diff --git a/classes/OAuth.class.php b/classes/OAuth.class.php
index 4fa19024b2cbfd5c40ca0ff51a360312ecd1a53c..a71768ab5ef4f172ae0e1d3d5b5d5ab786a9f718 100755
--- a/classes/OAuth.class.php
+++ b/classes/OAuth.class.php
@@ -22,7 +22,7 @@ class OAuth {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) \Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) \Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -88,7 +88,7 @@ class OAuth {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) \Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) \Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -141,4 +141,4 @@ class OAuth {
         \UserConfig::get($GLOBALS['user']->id)->delete("OWNCLOUD_ACCESS_TOKEN");
         \UserConfig::get($GLOBALS['user']->id)->delete("OWNCLOUD_REFRESH_TOKEN");
     }
-}
\ No newline at end of file
+}
diff --git a/classes/OwncloudFile.php b/classes/OwncloudFile.php
index e99a2bbf74f71fc836a9d4e92cbf1e6764bb6b9d..cc9798291cc003ad2401f0bc2759eabf69b2ef16 100644
--- a/classes/OwncloudFile.php
+++ b/classes/OwncloudFile.php
@@ -333,7 +333,7 @@ class OwncloudFile implements FileType
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -434,7 +434,7 @@ class OwncloudFile implements FileType
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
         curl_exec($r);
diff --git a/classes/OwncloudFolder.php b/classes/OwncloudFolder.php
index b5a34b8b6c3e323826a37391988a141ae5686d48..ca0ecc506bd780e560230f448d13bebbe5a820b6 100755
--- a/classes/OwncloudFolder.php
+++ b/classes/OwncloudFolder.php
@@ -58,7 +58,7 @@ class OwncloudFolder extends VirtualFolderType {
             curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
             curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
             curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-            if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+            if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
                 curl_setopt($r, CURLOPT_VERBOSE, true);
             }
             curl_exec($r);
@@ -90,7 +90,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -138,7 +138,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
         curl_exec($r);
@@ -185,7 +185,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -231,7 +231,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -277,7 +277,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
@@ -321,7 +321,7 @@ class OwncloudFolder extends VirtualFolderType {
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
diff --git a/controllers/oauth.php b/controllers/oauth.php
index 4d7bb015dbc003d30d5be92870500e623a18e1b9..7d84f402d5f45cd075e82f16b0b16846d30d723b 100755
--- a/controllers/oauth.php
+++ b/controllers/oauth.php
@@ -65,7 +65,7 @@ class OauthController extends PluginController
         curl_setopt($r, CURLOPT_RETURNTRANSFER, 1);
         curl_setopt($r, CURLOPT_SSL_VERIFYPEER, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
         curl_setopt($r, CURLOPT_SSL_VERIFYHOST, (bool) Config::get()->OWNCLOUD_SSL_VERIFYPEER);
-        if ($GLOBALS['OWNCLOUD_VERBOSE']) {
+        if (!empty($GLOBALS['OWNCLOUD_VERBOSE'])) {
             curl_setopt($r, CURLOPT_VERBOSE, true);
         }
 
diff --git a/plugin.manifest b/plugin.manifest
index 528880d9ff48bdd9b922dda1c1c5870932f82cfe..ce5b509f0afdd14524fc2e0cafcd40f2f8b7accc 100755
--- a/plugin.manifest
+++ b/plugin.manifest
@@ -1,6 +1,6 @@
 pluginname=OwnCloudPlugin
 pluginclassname=OwnCloudPlugin
-version=2.1.0
+version=2.1.1
 origin=data-quest
 studipMinVersion=5.0
 studipMaxVersion=5.3.99