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-rw-r--r--src/gtkutil.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gtkutil.h b/src/gtkutil.h
index b74244d84d0..63ecac07907 100644
--- a/src/gtkutil.h
+++ b/src/gtkutil.h
@@ -148,7 +148,8 @@ extern void xg_set_toolkit_horizontal_scroll_bar_thumb (struct scroll_bar *bar,
int portion,
int position,
int whole);
-extern bool xg_event_is_for_scrollbar (struct frame *, const EVENT *);
+extern bool xg_event_is_for_scrollbar (struct frame *, const EVENT *,
+ bool for_valuator);
extern int xg_get_default_scrollbar_width (struct frame *f);
extern int xg_get_default_scrollbar_height (struct frame *f);