diff --git a/gui/configure.ac b/gui/configure.ac
index a858cf3ce..004b4ca93 100644
--- a/gui/configure.ac
+++ b/gui/configure.ac
@@ -30,7 +30,7 @@ AM_PROG_LIBTOOL
 
 
 
-PKG_CHECK_MODULES(GTK_LUMIERA, [gtkmm-2.4 >= 2.8 gdl-1.0 >= 0.7.6])
+PKG_CHECK_MODULES(GTK_LUMIERA, [gtkmm-2.4 >= 2.8 gdl-1.0 >= 0.6.1])
 AC_SUBST(GTK_LUMIERA_CFLAGS)
 AC_SUBST(GTK_LUMIERA_LIBS)
 
diff --git a/gui/src/workspace/main-window.cpp b/gui/src/workspace/main-window.cpp
index db55282ed..f4578794d 100644
--- a/gui/src/workspace/main-window.cpp
+++ b/gui/src/workspace/main-window.cpp
@@ -29,10 +29,8 @@
 #include <libgdl-1.0/gdl/gdl-tools.h>
 #include <libgdl-1.0/gdl/gdl-dock.h>
 #include <libgdl-1.0/gdl/gdl-dock-item.h>
-#include <libgdl-1.0/gdl/gdl-dock-notebook.h>
 #include <libgdl-1.0/gdl/gdl-dock-placeholder.h>
 #include <libgdl-1.0/gdl/gdl-dock-bar.h>
-#include <libgdl-1.0/gdl/gdl-switcher.h>
 
 #include "gtk-lumiera.hpp"
 #include "main-window.hpp"