diff --git a/YACReaderLibrary/db/folder_model.cpp b/YACReaderLibrary/db/folder_model.cpp
index 54d63bf2..8884af18 100644
--- a/YACReaderLibrary/db/folder_model.cpp
+++ b/YACReaderLibrary/db/folder_model.cpp
@@ -13,6 +13,8 @@
 
 #include <algorithm>
 
+using namespace YACReader;
+
 #ifdef Y_MAC_UI
 #include <QFileIconProvider>
 QIcon finishedFolderIcon;