diff --git a/mouse.c b/mouse.c
index 0b192b2..235c2b8 100644
--- a/mouse.c
+++ b/mouse.c
@@ -273,7 +273,7 @@ void v3270_set_scroll_action(GtkWidget *widget, GdkScrollDirection direction, Gt
 	action_scroll[((int) direction) & 0x03] = action;
 }
 
-gboolean	  v3270_scroll_event(GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
+gboolean v3270_scroll_event(GtkWidget *widget, GdkEventScroll *event)
 {
 	v3270	* terminal	= GTK_V3270(widget);
 
diff --git a/private.h b/private.h
index 0925123..f9e1e71 100644
--- a/private.h
+++ b/private.h
@@ -254,6 +254,6 @@ gboolean	  v3270_button_release_event(GtkWidget *widget, GdkEventButton*event);
 gboolean	  v3270_motion_notify_event(GtkWidget *widget, GdkEventMotion *event);
 void		  v3270_emit_popup(v3270 *widget, int baddr, GdkEventButton *event);
 gint 		  v3270_get_offset_at_point(v3270 *widget, gint x, gint y);
-gboolean	  v3270_scroll_event(GtkWidget *widget, GdkEventScroll *event, gpointer user_data);
+gboolean	  v3270_scroll_event(GtkWidget *widget, GdkEventScroll *event);
 
 G_END_DECLS
--
libgit2 0.21.2