diff --git a/src/cmake.cc b/src/cmake.cc
index 03c9004..0501921 100644
--- a/src/cmake.cc
+++ b/src/cmake.cc
@@ -1,8 +1,8 @@
 #include "cmake.h"
 #include "singletons.h"
 #include "filesystem.h"
-#include <boost/regex.hpp>
 #include "dialogs.h"
+#include <boost/regex.hpp>
 
 #include <iostream> //TODO: remove
 using namespace std; //TODO: remove
diff --git a/src/directories.cc b/src/directories.cc
index 89f19f6..9aa8421 100644
--- a/src/directories.cc
+++ b/src/directories.cc
@@ -216,7 +216,7 @@ void Directories::add_path(const boost::filesystem::path& dir_path, const Gtk::T
     bool already_added=false;
     if(*children) {
       for(auto &child: *children) {
-        if(child.get_value(column_record.name)==filename) {
+        if(child->get_value(column_record.name)==filename) {
           not_deleted.emplace(filename);
           already_added=true;
           break;
diff --git a/src/files.h b/src/files.h
index dc6e635..32f6fd2 100644
--- a/src/files.h
+++ b/src/files.h
@@ -1,3 +1,5 @@
+#ifndef JUCI_FILES_H_
+#define JUCI_FILES_H_
 #include <string>
 
 #define JUCI_VERSION "0.9.6"
@@ -373,4 +375,4 @@ const std::string snippetpy =
 "    output=getSnippet(theWord) \n"
 "    juci.replaceWord(output) \n";
 
-
+#endif  // JUCI_FILES_H_
diff --git a/src/filesystem.h b/src/filesystem.h
index 46bcc67..10d51bb 100644
--- a/src/filesystem.h
+++ b/src/filesystem.h
@@ -1,5 +1,5 @@
-#ifndef JUCI_SOURCEFILE_H_
-#define JUCI_SOURCEFILE_H_
+#ifndef JUCI_FILESYSTEM_H_
+#define JUCI_FILESYSTEM_H_
 #include <vector>
 #include <string>
 #include <boost/filesystem.hpp>
@@ -26,4 +26,4 @@ public:
   static bool write(const boost::filesystem::path &path, Glib::RefPtr<Gtk::TextBuffer> text_buffer) { return write(path.string(), text_buffer); }
 
 };
-#endif  // JUCI_SOURCEFILE_H_
+#endif  // JUCI_FILESYSTEM_H_
diff --git a/src/juci.h b/src/juci.h
index b34df62..5c8f6cd 100644
--- a/src/juci.h
+++ b/src/juci.h
@@ -8,9 +8,9 @@
 class Application : public Gtk::Application {
 public:
   Application();
-  int on_command_line(const Glib::RefPtr<Gio::ApplicationCommandLine> &cmd);
-  void on_activate();
-  void on_startup();
+  int on_command_line(const Glib::RefPtr<Gio::ApplicationCommandLine> &cmd) override;
+  void on_activate() override;
+  void on_startup() override;
   std::unique_ptr<Window> window;
 private:
   std::vector<boost::filesystem::path> directories;
diff --git a/src/window.cc b/src/window.cc
index 0c85a33..6d50229 100644
--- a/src/window.cc
+++ b/src/window.cc
@@ -152,7 +152,7 @@ void Window::set_menu_actions() {
     notebook.open(Singleton::config->juci_home_path()/"config"/"config.json");
   });
   menu->add_action("quit", [this]() {
-    hide();
+    close();
   });
   
   menu->add_action("new_file", [this]() {
@@ -682,19 +682,14 @@ bool Window::on_key_press_event(GdkEventKey *event) {
   return Gtk::Window::on_key_press_event(event);
 }
 
-bool Window::on_delete_event (GdkEventAny *event) {
-  hide();
-  return true;
-}
-
-void Window::hide() {
+bool Window::on_delete_event(GdkEventAny *event) {
   auto size=notebook.size();
   for(int c=0;c<size;c++) {
     if(!notebook.close_current_page())
-      return;
+      return true;
   }
   Singleton::terminal->kill_async_executes();
-  Gtk::Window::hide();
+  return false;
 }
 
 void Window::search_and_replace_entry() {
diff --git a/src/window.h b/src/window.h
index 957b44d..d02f23c 100644
--- a/src/window.h
+++ b/src/window.h
@@ -11,9 +11,8 @@ public:
   Window();
   Notebook notebook;
 
-protected:
-  bool on_key_press_event(GdkEventKey *event);
-  bool on_delete_event (GdkEventAny *event);
+  bool on_key_press_event(GdkEventKey *event) override;
+  bool on_delete_event(GdkEventAny *event) override;
 
 private:
   Gtk::VPaned vpaned;
@@ -29,7 +28,6 @@ private:
   void configure();
   void set_menu_actions();
   void activate_menu_items(bool activate=true);
-  void hide();
   void search_and_replace_entry();
   void set_tab_entry();
   void goto_line_entry();