diff --git a/src/calibre/gui2/book_details.py b/src/calibre/gui2/book_details.py
index 6e18b7a68d..4dcd694eef 100644
--- a/src/calibre/gui2/book_details.py
+++ b/src/calibre/gui2/book_details.py
@@ -134,9 +134,8 @@ def render_html(mi, css, vertical, widget, all_fields=False, render_data_func=No
     if vertical:
         ans = templ%(table+right_pane)
     else:
-        ans = templ%(u'<table><tr><td valign="top" '
-            'style="padding-right:2em; width:40%%">%s</td><td valign="top">%s</td></tr></table>'
-                % (table, right_pane))
+        ans = templ%(u'<div style="float: left; margin-right: 1em; margin-bottom: 1em; max-width: 40%">{}</div><div>{}</div>'.format(
+                table, right_pane))
     return ans