diff --git a/data/core/docview.lua b/data/core/docview.lua
index 139333cc..3ecb699f 100644
--- a/data/core/docview.lua
+++ b/data/core/docview.lua
@@ -391,7 +391,7 @@ function DocView:draw_line_gutter(idx, x, y)
   end
   local yoffset = self:get_line_text_y_offset()
   x = x + style.padding.x
-  local width = string.len(tostring(#self.doc.lines)) * style.padding.x / 2 + style.padding.x / 2
+  local width = local width = self:get_font():get_width(#self.doc.lines)
   common.draw_text(self:get_font(), color, idx, "right", x, y + yoffset, width,  self:get_line_height())
 end