diff --git a/apps/files_trashbin/lib/trash.php b/apps/files_trashbin/lib/trash.php
index a04545e326..d4d5ad96cf 100644
--- a/apps/files_trashbin/lib/trash.php
+++ b/apps/files_trashbin/lib/trash.php
@@ -96,20 +96,21 @@ class Trashbin {
 					$view->rename($keyfile.'.key', 'files_trashbin/keyfiles/'. $deleted.'.key.d'.$timestamp);
 				}
 			}
-
 		} else {
 			\OC_Log::write('files_trashbin', 'Couldn\'t move '.$file_path.' to the trash bin', \OC_log::ERROR);
 		}
 		
 		// get available disk space for user
-		$quota = \OCP\Util::computerFileSize(\OC_Preferences::getValue($user, 'files', 'quota'));
+		$quota = \OC_Preferences::getValue($user, 'files', 'quota');
 		if ( $quota === null ) {
-			$quota = \OCP\Util::computerFileSize(\OC_Appconfig::getValue('files', 'default_quota'));
+			$quota = \OC_Appconfig::getValue('files', 'default_quota');
 		}
 		if ( $quota === null ) {
 			$quota = \OC\Files\Filesystem::free_space('/') / count(\OCP\User::getUsers());
+		} else {
+			$quota = \OCP\Util::computerFileSize($quota);
 		}
-
+		
 		// calculate available space for trash bin
 		$rootInfo = $view->getFileInfo('/files');
 		$free = $quota-$rootInfo['size']; // remaining free space for user
@@ -118,7 +119,6 @@ class Trashbin {
 		} else {
 			$availableSpace = $free-$trashbinSize;
 		}
-
 		$trashbinSize -= self::expire($availableSpace);
 		
 		self::setTrashbinSize($user, $trashbinSize);
diff --git a/apps/files_versions/lib/versions.php b/apps/files_versions/lib/versions.php
index 05c1bf53e4..778fefd8a7 100644
--- a/apps/files_versions/lib/versions.php
+++ b/apps/files_versions/lib/versions.php
@@ -350,12 +350,14 @@ class Storage {
 			$versions_fileview = new \OC\Files\View('/'.$uid.'/files_versions');
 
 			// get available disk space for user
-			$quota = \OCP\Util::computerFileSize(\OC_Preferences::getValue($uid, 'files', 'quota'));
-			if ( $quota == null ) {
-				$quota = \OCP\Util::computerFileSize(\OC_Appconfig::getValue('files', 'default_quota'));
+			$quota = \OC_Preferences::getValue($uid, 'files', 'quota');
+			if ( $quota === null ) {
+				$quota = \OC_Appconfig::getValue('files', 'default_quota');
 			}
-			if ( $quota == null ) {
+			if ( $quota === null ) {
 				$quota = \OC\Files\Filesystem::free_space('/') / count(\OCP\User::getUsers());
+			} else {
+				$quota = \OCP\Util::computerFileSize($quota);
 			}
 
 			// make sure that we have the current size of the version history