diff --git a/app/routes/forum/topic.py b/app/routes/forum/topic.py
index 2af6b3b..324015f 100644
--- a/app/routes/forum/topic.py
+++ b/app/routes/forum/topic.py
@@ -72,7 +72,7 @@ def forum_topic(f, page):
     comments = t.thread.comments.paginate(page,
                                           Thread.COMMENTS_PER_PAGE, True)
 
-    now_minus = datetime.datetime.now() - datetime.timedelta(minutes=15)
-    last_edited_comment = t.thread.comments.filter(Comment.date_modified >= now_minus).first()
+    now_minus = datetime.datetime.now() - datetime.timedelta(minutes=1)
+    last_updated_comment = t.thread.comments.filter(Comment.date_modified <= now_minus).first()
 
-    return render('/forum/topic.html', t=t, form=form, comments=comments, last=last_edited_comment)
+    return render('/forum/topic.html', t=t, form=form, comments=comments, last=last_updated_comment)
diff --git a/app/templates/forum/topic.html b/app/templates/forum/topic.html
index 99b454a..8353ae5 100644
--- a/app/templates/forum/topic.html
+++ b/app/templates/forum/topic.html
@@ -19,9 +19,10 @@
 
     {{ widget_pagination.paginate(comments, 'forum_topic', t, {'f': t.forum}) }}
 
-    {% if not last %}
+    {% if last %}
     <div class="bg-warn">
         Ce topic est sans activité depuis plus de X jours, êtes-vous sûr de vouloir y poster ?
+        {{ last }}
     </div>
     {% endif %}