diff --git a/gui/idle.c b/gui/idle.c
index 79dc6208..31e962b0 100644
--- a/gui/idle.c
+++ b/gui/idle.c
@@ -5,6 +5,8 @@
 #include <gui/builder.h>
 #include <gtk/gtk.h>
 
+static guint idle_id = 0;
+
 static gboolean __on_idle(gpointer data)
 {
 	GtkProgressBar *progress = GTK_PROGRESS_BAR(data);
@@ -14,6 +16,7 @@ static gboolean __on_idle(gpointer data)
 		return gtk_widget_is_visible(gui_builder_widget("o_window"));
 	} else {
 		gtk_widget_hide(GTK_WIDGET(progress));
+		idle_id = 0;
 		return G_SOURCE_REMOVE;
 	}
 }
@@ -23,5 +26,12 @@ void gui_idle_enable()
 	GtkWidget *progress = gui_builder_widget("o_idle_progress");
 
 	gtk_widget_show(progress);
-	g_idle_add(__on_idle, progress);
+	idle_id = g_idle_add(__on_idle, progress);
+}
+
+void gui_idle_disable()
+{
+	if (idle_id)
+		g_source_remove(idle_id);
+	idle_cancel();
 }
diff --git a/gui/ocarina.c b/gui/ocarina.c
index c9e0ff9d..bfb37f28 100644
--- a/gui/ocarina.c
+++ b/gui/ocarina.c
@@ -2,7 +2,6 @@
  * Copyright 2014 (c) Anna Schumaker.
  */
 #include <core/core.h>
-#include <core/idle.h>
 #include <gui/audio.h>
 #include <gui/builder.h>
 #include <gui/collection.h>
@@ -75,7 +74,7 @@ static void __ocarina_startup(GApplication *application, gpointer data)
 
 static void __ocarina_shutdown(GApplication *application, gpointer data)
 {
-	idle_cancel();
+	gui_idle_disable();
 	core_deinit();
 
 	gui_window_deinit();
diff --git a/include/gui/idle.h b/include/gui/idle.h
index 0101751a..e579c268 100644
--- a/include/gui/idle.h
+++ b/include/gui/idle.h
@@ -7,4 +7,7 @@
 /* Called to enable processing idle queue tasks. */
 void gui_idle_enable();
 
+/* Called to disable processing idle queue tasks. */
+void gui_idle_disable();
+
 #endif /* OCARINA_GUI_IDLE_H */