diff --git a/src/popupwin.c b/src/popupwin.c
index 25bb153..38c1c9e 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -654,8 +654,8 @@
 	    wp->w_topline = wp->w_buffer->b_ml.ml_line_count;
 	while (wp->w_topline < wp->w_cursor.lnum
 		&& wp->w_topline < wp->w_buffer->b_ml.ml_line_count
-		&& plines_m_win(wp, wp->w_topline, wp->w_cursor.lnum, FALSE)
-								> wp->w_height)
+		&& plines_m_win(wp, wp->w_topline, wp->w_cursor.lnum,
+					    wp->w_height + 1) > wp->w_height)
 	    ++wp->w_topline;
     }