diff --git a/src/gtk/timer.cpp b/src/gtk/timer.cpp
index eb7a15fbb5..3b132f0a3b 100644
--- a/src/gtk/timer.cpp
+++ b/src/gtk/timer.cpp
@@ -13,8 +13,9 @@
 #if wxUSE_TIMER
 
 #include "wx/timer.h"
+#include "wx/app.h"
 
-#include "gtk/gtk.h"
+#include <gtk/gtk.h>
 
 // ----------------------------------------------------------------------------
 // wxTimer
@@ -45,6 +46,10 @@ static gint timeout_callback( gpointer data )
     // Release lock again.
     gdk_threads_leave();
 
+    wxApp* app = wxTheApp;
+    if (app)
+        app->WakeUpIdle();
+
     if (timer->IsOneShot())
         return FALSE;