--- a/src/gtkdialog.h
+++ b/src/gtkdialog.h
@@ -40,24 +40,24 @@
 #define GTKD_FUNCTION_SIGNALS_BLOCK (function_signals_block++)
 #define GTKD_FUNCTION_SIGNALS_UNBLOCK (function_signals_block--)
 #define GTKD_FUNCTION_SIGNALS_RESET (function_signals_block = FALSE)
-gint function_signals_block;
+extern gint function_signals_block;
 
 /* Thunor: Used to control/override the widget packing expand and fill
  * states at the project level */
-gint project_space_expand;
-gint project_space_fill;
+extern gint project_space_expand;
+extern gint project_space_fill;
 
 /* The most recently created radiobutton widget (used for grouping) */
-GtkWidget *lastradiowidget;
+extern GtkWidget *lastradiowidget;
 
 /* An accumulated list of menu accelerator groups to be added to the window */
-GList *accel_groups;
+extern GList *accel_groups;
 
 /* A list of widgets to hide and to show */
-GList *widget_hide_list, *widget_show_list;
+extern GList *widget_hide_list, *widget_show_list;
 
 /* An auto-incremented unique id for each window created */
-gint window_id;
+extern gint window_id;
 
 void reset_program_source(void);
 //Redundant: gint set_program_source(gchar *name);
--- a/src/gtkdialog.c
+++ b/src/gtkdialog.c
@@ -82,6 +82,14 @@
 gint geometry_x = 0;
 gint geometry_y = 0;
 
+gint function_signals_block;
+gint project_space_expand;
+gint project_space_fill;
+GtkWidget *lastradiowidget;
+GList *accel_groups;
+GList *widget_hide_list, *widget_show_list;
+gint window_id;
+
 static gboolean 
 get_geometry(const char *argument)
 {
