diff --git a/app/models/person.rb b/app/models/person.rb
index eef78ed..0c88cb1 100644
--- a/app/models/person.rb
+++ b/app/models/person.rb
@@ -435,6 +435,7 @@ roles] }
   end
 
   def follows?(profile)
+    return false if profile.nil?
     profile.followed_by?(self)
   end
 
diff --git a/test/unit/article_test.rb b/test/unit/article_test.rb
index 3393f85..ae1675d 100644
--- a/test/unit/article_test.rb
+++ b/test/unit/article_test.rb
@@ -2018,4 +2018,23 @@ class ArticleTest < ActiveSupport::TestCase
     assert_equal [a], Article.display_filter(user, p)
   end
 
+  should 'display_filter do not show person private content to non friends passing nil as profile parameter' do
+    user = create_user('someuser').person
+    p = fast_create(Person)
+    assert !p.is_a_friend?(user)
+    assert !user.is_admin?
+    Article.delete_all
+    fast_create(Article, :published => false, :profile_id => p.id)
+    assert_equal [], Article.display_filter(user, nil)
+  end
+
+  should 'display_filter do not show community private content to non members passing nil as profile parameter' do
+    user = create_user('someuser').person
+    p = fast_create(Community)
+    assert !user.is_member_of?(p)
+    Article.delete_all
+    fast_create(Article, :published => false, :profile_id => p.id)
+    assert_equal [], Article.display_filter(user, nil)
+  end
+
 end
diff --git a/test/unit/person_test.rb b/test/unit/person_test.rb
index 4aac899..c2cdede 100644
--- a/test/unit/person_test.rb
+++ b/test/unit/person_test.rb
@@ -1631,4 +1631,9 @@ class PersonTest < ActiveSupport::TestCase
     assert person.can_change_homepage?
   end
 
+  should 'follow? return false when no profile is passed as parameter' do
+    person = Person.new
+    assert_equal false, person.follows?(nil)
+  end
+
 end
--
libgit2 0.21.2