diff --git a/app/helpers/communities_helper.rb b/app/helpers/communities_helper.rb
index 22bc76617..744749a68 100644
--- a/app/helpers/communities_helper.rb
+++ b/app/helpers/communities_helper.rb
@@ -32,4 +32,7 @@ module CommunitiesHelper
     community.from_proposal? ? t("community.sidebar.description.proposal") : t("community.sidebar.description.investment")
   end
 
+  def create_topic_link(community)
+    current_user.present? ? new_community_topic_path(community.id) : new_user_session_path
+  end
 end
diff --git a/app/views/communities/show.html.erb b/app/views/communities/show.html.erb
index 59fa73646..4da0369b9 100644
--- a/app/views/communities/show.html.erb
+++ b/app/views/communities/show.html.erb
@@ -17,7 +17,7 @@
     <aside class="small-12 column show-for-small-only">
       <div class="sidebar-divider"></div>
       <h2><%= t("community.show.sidebar.participate") %></h2>
-      <%= link_to t("community.show.sidebar.new_topic"), new_community_topic_path(@community.id), class: "button expanded" %>
+      <%= link_to t("community.show.sidebar.new_topic"), create_topic_link(@community) , class: "button expanded" %>
     </aside>
 
     <div class="small-12 medium-9 column">
@@ -30,7 +30,7 @@
     <aside class="small-12 medium-3 column hide-for-small-only">
       <div class="sidebar-divider"></div>
       <h2><%= t("community.show.sidebar.participate") %></h2>
-      <%= link_to t("community.show.sidebar.new_topic"), new_community_topic_path(@community.id), class: "button expanded" %>
+      <%= link_to t("community.show.sidebar.new_topic"), create_topic_link(@community) , class: "button expanded" %>
     </aside>
   </div>
 </div>