diff --git a/desmume/src/gtk-glade/callbacks_IO.cpp b/desmume/src/gtk-glade/callbacks_IO.cpp
index bbaba471e..b5c87d2c8 100755
--- a/desmume/src/gtk-glade/callbacks_IO.cpp
+++ b/desmume/src/gtk-glade/callbacks_IO.cpp
@@ -81,6 +81,8 @@ void black_screen () {
 // else see gdk_gl.c / gdk_gl.h
 BOOL my_gl_Begin (int screen) { return FALSE; }
 void my_gl_End (int screen) {}
+void reshape (GtkWidget * widget, int screen) {}
+void init_GL_capabilities( int use_software_convert) {}
 
 int has_pix_col_map=0;
 u32 pix_col_map[0x8000];
diff --git a/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp b/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
index 0a4b4f719..ba3f9b39e 100755
--- a/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
+++ b/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
@@ -19,6 +19,7 @@
  * Boston, MA 02111-1307, USA.
  */
 
+#ifdef GTKGLEXT_AVAILABLE
 #include "callbacks_dtools.h"
 #include "../gdk_gl.h"
 
@@ -459,3 +460,5 @@ void other_screen (GtkWidget * widget, int screen) {
 }
 
 #endif
+
+#endif