diff --git a/gtk/gtkclist.c b/gtk/gtkclist.c
index cca25b8fc..c36342166 100644
--- a/gtk/gtkclist.c
+++ b/gtk/gtkclist.c
@@ -937,7 +937,7 @@ gtk_clist_init (GtkCList *clist)
 void
 gtk_clist_construct (GtkCList *clist,
 		     gint      columns,
-		     gchar    *titles[])
+		     const gchar *titles[])
 {
   g_return_if_fail (clist != NULL);
   g_return_if_fail (GTK_IS_CLIST (clist));
@@ -1008,7 +1008,7 @@ gtk_clist_new (gint columns)
  
 GtkWidget*
 gtk_clist_new_with_titles (gint   columns,
-			   gchar *titles[])
+			   const gchar *titles[])
 {
   GtkWidget *widget;
 
@@ -2522,8 +2522,8 @@ cell_size_request (GtkCList       *clist,
  *   gtk_clist_clear
  */
 gint
-gtk_clist_prepend (GtkCList *clist,
-		   gchar    *text[])
+gtk_clist_prepend (GtkCList    *clist,
+		   const gchar *text[])
 {
   g_return_val_if_fail (clist != NULL, -1);
   g_return_val_if_fail (GTK_IS_CLIST (clist), -1);
@@ -2533,8 +2533,8 @@ gtk_clist_prepend (GtkCList *clist,
 }
 
 gint
-gtk_clist_append (GtkCList *clist,
-		  gchar    *text[])
+gtk_clist_append (GtkCList    *clist,
+		  const gchar *text[])
 {
   g_return_val_if_fail (clist != NULL, -1);
   g_return_val_if_fail (GTK_IS_CLIST (clist), -1);
@@ -2544,9 +2544,9 @@ gtk_clist_append (GtkCList *clist,
 }
 
 gint
-gtk_clist_insert (GtkCList *clist,
-		  gint      row,
-		  gchar    *text[])
+gtk_clist_insert (GtkCList    *clist,
+		  gint         row,
+		  const gchar *text[])
 {
   g_return_val_if_fail (clist != NULL, -1);
   g_return_val_if_fail (GTK_IS_CLIST (clist), -1);
diff --git a/gtk/gtkclist.h b/gtk/gtkclist.h
index 5ca8f5af2..2323b3481 100644
--- a/gtk/gtkclist.h
+++ b/gtk/gtkclist.h
@@ -378,12 +378,12 @@ GtkType gtk_clist_get_type (void);
 /* constructors useful for gtk-- wrappers */
 void gtk_clist_construct (GtkCList *clist,
 			  gint      columns,
-			  gchar    *titles[]);
+			  const gchar *titles[]);
 
 /* create a new GtkCList */
 GtkWidget* gtk_clist_new             (gint   columns);
 GtkWidget* gtk_clist_new_with_titles (gint   columns,
-				      gchar *titles[]);
+				      const gchar *titles[]);
 
 /* set adjustments of clist */
 void gtk_clist_set_hadjustment (GtkCList      *clist,
@@ -604,17 +604,17 @@ gboolean gtk_clist_get_selectable (GtkCList *clist,
 /* prepend/append returns the index of the row you just added,
  * making it easier to append and modify a row
  */
-gint gtk_clist_prepend (GtkCList *clist,
-		        gchar    *text[]);
-gint gtk_clist_append  (GtkCList *clist,
-			gchar    *text[]);
+gint gtk_clist_prepend (GtkCList    *clist,
+		        const gchar *text[]);
+gint gtk_clist_append  (GtkCList    *clist,
+			const gchar *text[]);
 
 /* inserts a row at index row and returns the row where it was
  * actually inserted (may be different from "row" in auto_sort mode)
  */
-gint gtk_clist_insert (GtkCList *clist,
-		       gint      row,
-		       gchar    *text[]);
+gint gtk_clist_insert (GtkCList    *clist,
+		       gint         row,
+		       const gchar *text[]);
 
 /* removes row at index row */
 void gtk_clist_remove (GtkCList *clist,
diff --git a/gtk/gtkctree.c b/gtk/gtkctree.c
index 3e824de29..9934a58c3 100644
--- a/gtk/gtkctree.c
+++ b/gtk/gtkctree.c
@@ -3880,10 +3880,10 @@ ctree_is_hot_spot (GtkCTree     *ctree,
  ***********************************************************/
 
 void
-gtk_ctree_construct (GtkCTree *ctree,
-		     gint      columns, 
-		     gint      tree_column,
-		     gchar    *titles[])
+gtk_ctree_construct (GtkCTree    *ctree,
+		     gint         columns, 
+		     gint         tree_column,
+		     const gchar *titles[])
 {
   GtkCList *clist;
 
@@ -3911,9 +3911,9 @@ gtk_ctree_construct (GtkCTree *ctree,
 }
 
 GtkWidget *
-gtk_ctree_new_with_titles (gint   columns, 
-			   gint   tree_column,
-			   gchar *titles[])
+gtk_ctree_new_with_titles (gint         columns, 
+			   gint         tree_column,
+			   const gchar *titles[])
 {
   GtkWidget *widget;
 
diff --git a/gtk/gtkctree.h b/gtk/gtkctree.h
index 141316a14..0abc075b3 100644
--- a/gtk/gtkctree.h
+++ b/gtk/gtkctree.h
@@ -177,10 +177,10 @@ GtkType gtk_ctree_get_type                       (void);
 void gtk_ctree_construct                         (GtkCTree     *ctree,
 						  gint          columns, 
 						  gint          tree_column,
-						  gchar        *titles[]);
+						  const gchar  *titles[]);
 GtkWidget * gtk_ctree_new_with_titles            (gint          columns, 
 						  gint          tree_column,
-						  gchar        *titles[]);
+						  const gchar  *titles[]);
 GtkWidget * gtk_ctree_new                        (gint          columns, 
 						  gint          tree_column);
 GtkCTreeNode * gtk_ctree_insert_node             (GtkCTree     *ctree,
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index ee637473c..a04965459 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -3925,7 +3925,7 @@ gtk_notebook_set_tab_label (GtkNotebook *notebook,
 void
 gtk_notebook_set_tab_label_text (GtkNotebook *notebook,
 				 GtkWidget   *child,
-				 gchar       *tab_text)
+				 const gchar *tab_text)
 {
   GtkWidget *tab_label = NULL;
 
@@ -4000,7 +4000,7 @@ gtk_notebook_set_menu_label (GtkNotebook *notebook,
 void
 gtk_notebook_set_menu_label_text (GtkNotebook *notebook,
 				  GtkWidget   *child,
-				  gchar       *menu_text)
+				  const gchar *menu_text)
 {
   GtkWidget *menu_label = NULL;
 
diff --git a/gtk/gtknotebook.h b/gtk/gtknotebook.h
index 5531722d2..7c0c149a8 100644
--- a/gtk/gtknotebook.h
+++ b/gtk/gtknotebook.h
@@ -179,7 +179,7 @@ void gtk_notebook_set_tab_label           (GtkNotebook *notebook,
 					   GtkWidget   *tab_label);
 void gtk_notebook_set_tab_label_text      (GtkNotebook *notebook,
 					   GtkWidget   *child,
-					   gchar       *tab_text);
+					   const gchar *tab_text);
 GtkWidget * gtk_notebook_query_menu_label (GtkNotebook *notebook,
 					   GtkWidget   *child);
 void gtk_notebook_set_menu_label          (GtkNotebook *notebook,
@@ -187,7 +187,7 @@ void gtk_notebook_set_menu_label          (GtkNotebook *notebook,
 					   GtkWidget   *menu_label);
 void gtk_notebook_set_menu_label_text     (GtkNotebook *notebook,
 					   GtkWidget   *child,
-					   gchar       *menu_text);
+					   const gchar *menu_text);
 void gtk_notebook_query_tab_label_packing (GtkNotebook *notebook,
 					   GtkWidget   *child,
 					   gboolean    *expand,
diff --git a/gtk/gtkrc.c b/gtk/gtkrc.c
index 59dc6f481..23f2f2b39 100644
--- a/gtk/gtkrc.c
+++ b/gtk/gtkrc.c
@@ -1359,7 +1359,7 @@ gtk_rc_parse_bg_pixmap (GScanner   *scanner,
 
 gchar*
 gtk_rc_find_pixmap_in_path (GScanner *scanner,
-			    gchar    *pixmap_file)
+			    const gchar *pixmap_file)
 {
   gint i;
   gint fd;
@@ -1392,7 +1392,7 @@ gtk_rc_find_pixmap_in_path (GScanner *scanner,
 
 gchar*
 gtk_rc_find_module_in_path (GScanner *scanner,
-			    gchar    *module_file)
+			    const gchar *module_file)
 {
   gint i;
   gint fd;
diff --git a/gtk/gtkrc.h b/gtk/gtkrc.h
index 8600f2138..53e3188b5 100644
--- a/gtk/gtkrc.h
+++ b/gtk/gtkrc.h
@@ -83,10 +83,10 @@ void	  gtk_rc_set_image_loader(GtkImageLoader loader);
 GdkPixmap *gtk_rc_load_image (GdkColormap *colormap,
 			      GdkColor    *transparent_color,
 			      const gchar *filename);
-gchar      *gtk_rc_find_pixmap_in_path (GScanner *scanner,
-					gchar    *pixmap_file);
+gchar      *gtk_rc_find_pixmap_in_path (GScanner    *scanner,
+					const gchar *pixmap_file);
 gchar      *gtk_rc_find_module_in_path (GScanner *scanner,
-					gchar    *module_file);
+					const gchar *module_file);
 gchar      *gtk_rc_get_theme_dir(void);
 gchar      *gtk_rc_get_module_dir(void);