diff --git a/window-copy.c b/window-copy.c
index 68e260dc..636bee06 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -822,7 +822,7 @@ window_copy_mouse(
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
-	u_int				 i, old_cy;
+	u_int				 i;
 
 	if (m->x >= screen_size_x(s))
 		return;
@@ -835,10 +835,9 @@ window_copy_mouse(
 			for (i = 0; i < 5; i++)
 				window_copy_cursor_up(wp, 0);
 		} else if ((m->b & MOUSE_BUTTON) == MOUSE_2) {
-			old_cy = data->cy;
 			for (i = 0; i < 5; i++)
 				window_copy_cursor_down(wp, 0);
-			if (old_cy == data->cy)
+			if (data->oy == 0)
 				goto reset_mode;
 		}
 		return;