1 files changed, 2 insertions, 2 deletions

diff --git a/src/xterm.c b/src/xterm.c
index a9a10297bef..b5f87c46cc6 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -2135,8 +2135,8 @@ XTset_vertical_scroll_bar (window, portion, whole, position)
         x_scroll_bar_set_handle (bar, 0, top_range, 0);
       else
         {
-          int start = (position * top_range) / whole;
-          int end = ((position + portion) * top_range) / whole;
+          int start = ((double) position * top_range) / whole;
+          int end = ((double) (position + portion) * top_range) / whole;
 
           x_scroll_bar_set_handle (bar, start, end, 0);
         }