diff --git a/mod/forum/view.php b/mod/forum/view.php
index 53bacb2b1a0..b8c8043442a 100644
--- a/mod/forum/view.php
+++ b/mod/forum/view.php
@@ -221,6 +221,7 @@
             }
             $displaymode = get_user_preferences("forum_displaymode", $CFG->forum_displaymode);
             $canrate = has_capability('mod/forum:rate', $context);
+            echo ' '; // this should fix the floating in FF
             forum_print_discussion($course, $cm, $forum, $discussion, $post, $displaymode, NULL, $canrate);
             break;