diff --git a/app/controllers/communities_controller.rb b/app/controllers/communities_controller.rb
index f6f1e4816..0d1ac6890 100644
--- a/app/controllers/communities_controller.rb
+++ b/app/controllers/communities_controller.rb
@@ -7,6 +7,7 @@ class CommunitiesController < ApplicationController
   skip_authorization_check
 
   def show
+    raise ActionController::RoutingError, 'Not Found' unless communitable_exists?
     redirect_to root_path if Setting['feature.community'].blank?
   end
 
@@ -31,4 +32,8 @@ class CommunitiesController < ApplicationController
   def valid_order?
     params[:order].present? && TOPIC_ORDERS.include?(params[:order])
   end
+
+  def communitable_exists?
+    @community.proposal.present? || @community.investment.present?
+  end
 end
diff --git a/app/models/community.rb b/app/models/community.rb
index 7d7073412..c9dd0ddfb 100644
--- a/app/models/community.rb
+++ b/app/models/community.rb
@@ -28,7 +28,7 @@ class Community < ActiveRecord::Base
   end
 
   def author_from_community
-    from_proposal? ? User.where(id: proposal.author_id) : User.where(id: investment.author_id)
+    from_proposal? ? User.where(id: proposal&.author_id) : User.where(id: investment&.author_id)
   end
 
 end
diff --git a/spec/features/communities_spec.rb b/spec/features/communities_spec.rb
index 4841a473a..0b9fa2c01 100644
--- a/spec/features/communities_spec.rb
+++ b/spec/features/communities_spec.rb
@@ -145,6 +145,14 @@ feature 'Communities' do
       expect(page).to have_current_path(root_path)
     end
 
+    scenario "Accesing a community without associated communitable" do
+      proposal = create(:proposal)
+      community = proposal.community
+      proposal.really_destroy!
+      community.reload
+
+      expect { visit community_path(community) }.to raise_error(ActionController::RoutingError)
+    end
   end
 
 end