diff --git a/src/widgets/FileDialog/gtk/FileDialogPrivate.cpp b/src/widgets/FileDialog/gtk/FileDialogPrivate.cpp
index cd49ba8db..a1054efc1 100644
--- a/src/widgets/FileDialog/gtk/FileDialogPrivate.cpp
+++ b/src/widgets/FileDialog/gtk/FileDialogPrivate.cpp
@@ -11,6 +11,8 @@
 
 #include <gtk/gtk.h>
 
+#include "../FileDialog.h"
+
 #include "wx/intl.h"
 #include "wx/msgdlg.h"
 
diff --git a/src/widgets/FileDialog/mac/FileDialogPrivate.h b/src/widgets/FileDialog/mac/FileDialogPrivate.h
index cd2346cec..7fe79111c 100644
--- a/src/widgets/FileDialog/mac/FileDialogPrivate.h
+++ b/src/widgets/FileDialog/mac/FileDialogPrivate.h
@@ -14,6 +14,8 @@
 #ifndef _MAC_FILEDIALOG_H_
 #define _MAC_FILEDIALOG_H_
 
+#include "../FileDialog.h"
+
 class wxChoice;
 
 //-------------------------------------------------------------------------
diff --git a/src/widgets/FileDialog/mac/FileDialogPrivate.mm b/src/widgets/FileDialog/mac/FileDialogPrivate.mm
index 1d59b0012..55ee44dbf 100644
--- a/src/widgets/FileDialog/mac/FileDialogPrivate.mm
+++ b/src/widgets/FileDialog/mac/FileDialogPrivate.mm
@@ -24,6 +24,8 @@
 // For compilers that support precompilation, includes "wx.h".
 #include <wx/wxprec.h>
 
+#include "../FileDialog.h"
+
 #ifndef WX_PRECOMP
     #include <wx/msgdlg.h>
     #include <wx/app.h>
diff --git a/src/widgets/FileDialog/win/FileDialogPrivate.cpp b/src/widgets/FileDialog/win/FileDialogPrivate.cpp
index 07064bb2f..0f95a7c9e 100644
--- a/src/widgets/FileDialog/win/FileDialogPrivate.cpp
+++ b/src/widgets/FileDialog/win/FileDialogPrivate.cpp
@@ -49,6 +49,8 @@
 #include <wx/modalhook.h>
 #include <wx/filectrl.h>
 
+#include "../FileDialog.h"
+
 #include <shlobj.h>
 
 // ----------------------------------------------------------------------------