diff --git a/lib/filecache.php b/lib/filecache.php
index f1d6a823c4..2479d29e32 100644
--- a/lib/filecache.php
+++ b/lib/filecache.php
@@ -352,21 +352,34 @@ class OC_FileCache{
 	 */
 	public static function increaseSize($path, $sizeDiff, $root=false) {
 		if($sizeDiff==0) return;
-		$id=self::getId($path, $root);
+		$item = OC_FileCache_Cached::get($path);
+		//stop walking up the filetree if we hit a non-folder
+		if($item['mimetype'] !== 'httpd/unix-directory'){
+			return;
+		}
+		$id = $item['id'];
 		while($id!=-1) {//walk up the filetree increasing the size of all parent folders
 			$query=OC_DB::prepare('UPDATE `*PREFIX*fscache` SET `size`=`size`+? WHERE `id`=?');
 			$query->execute(array($sizeDiff, $id));
-			$id=self::getParentId($path);
+			if($path == '' or $path =='/'){
+				return;
+			}
 			$path=dirname($path);
+			$parent = OC_FileCache_Cached::get($path);
+			$id = $parent['id'];
+			//stop walking up the filetree if we hit a non-folder
+			if($parent['mimetype'] !== 'httpd/unix-directory'){
+				return;
+			}
 		}
 	}
 
 	/**
 	 * recursively scan the filesystem and fill the cache
 	 * @param string $path
-	 * @param OC_EventSource $enventSource (optional)
-	 * @param int count (optional)
-	 * @param string root (optional)
+	 * @param OC_EventSource $eventSource (optional)
+	 * @param int $count (optional)
+	 * @param string $root (optional)
 	 */
 	public static function scan($path, $eventSource=false,&$count=0, $root=false) {
 		if($eventSource) {
diff --git a/lib/filecache/cached.php b/lib/filecache/cached.php
index 7458322fb1..5e0a00746b 100644
--- a/lib/filecache/cached.php
+++ b/lib/filecache/cached.php
@@ -18,7 +18,7 @@ class OC_FileCache_Cached{
 			$root=OC_Filesystem::getRoot();
 		}
 		$path=$root.$path;
-		$stmt=OC_DB::prepare('SELECT `path`,`ctime`,`mtime`,`mimetype`,`size`,`encrypted`,`versioned`,`writable` FROM `*PREFIX*fscache` WHERE `path_hash`=?');
+		$stmt=OC_DB::prepare('SELECT `id`, `path`,`ctime`,`mtime`,`mimetype`,`size`,`encrypted`,`versioned`,`writable` FROM `*PREFIX*fscache` WHERE `path_hash`=?');
 		if ( ! OC_DB::isError($stmt) ) {
 			$result=$stmt->execute(array(md5($path)));
 			if ( ! OC_DB::isError($result) ) {
@@ -78,4 +78,4 @@ class OC_FileCache_Cached{
 			return false;
 		}
 	}
-}
\ No newline at end of file
+}