diff --git a/lib/widget/buttonbar.c b/lib/widget/buttonbar.c
index d15b9fc47..420ffd373 100644
--- a/lib/widget/buttonbar.c
+++ b/lib/widget/buttonbar.c
@@ -261,8 +261,8 @@ buttonbar_new (gboolean visible)
 /* --------------------------------------------------------------------------------------------- */
 
 void
-buttonbar_set_label (WButtonBar * bb, int idx, const char *text,
-                     const global_keymap_t * keymap, const Widget * receiver)
+buttonbar_set_label (WButtonBar * bb, int idx, const char *text, const global_keymap_t * keymap,
+                     Widget * receiver)
 {
     if ((bb != NULL) && (idx >= 1) && (idx <= BUTTONBAR_LABELS_NUM))
     {
diff --git a/lib/widget/buttonbar.h b/lib/widget/buttonbar.h
index 83f67bc1f..922240e9a 100644
--- a/lib/widget/buttonbar.h
+++ b/lib/widget/buttonbar.h
@@ -38,7 +38,7 @@ typedef struct WButtonBar
 
 WButtonBar *buttonbar_new (gboolean visible);
 void buttonbar_set_label (WButtonBar * bb, int idx, const char *text,
-                          const global_keymap_t * keymap, const Widget * receiver);
+                          const global_keymap_t * keymap, Widget * receiver);
 WButtonBar *find_buttonbar (const WDialog * h);
 
 /*** inline functions ****************************************************************************/