diff --git a/Changelog.md b/Changelog.md
index fc711262e..f90fdafb8 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -68,6 +68,7 @@ With the port to Bootstrap 3, app/views/terms/default.haml has a new structure.
 * Prevent multiple comment boxes on mobile [#6363](https://github.com/diaspora/diaspora/pull/6363)
 * Correctly display location in post preview [#6429](https://github.com/diaspora/diaspora/pull/6429)
 * Do not fail when submitting an empty comment in the mobile view [#6543](https://github.com/diaspora/diaspora/pull/6543)
+* Limit flash message width on small devices [#6529](https://github.com/diaspora/diaspora/pull/6529)
 
 ## Features
 * Support color themes [#6033](https://github.com/diaspora/diaspora/pull/6033)
@@ -94,7 +95,7 @@ With the port to Bootstrap 3, app/views/terms/default.haml has a new structure.
 * Correctly skip setting sidekiq logfile on Heroku [#6500](https://github.com/diaspora/diaspora/pull/6500)
 * Fix notifications for interactions by non-contacts [#6498](https://github.com/diaspora/diaspora/pull/6498)
 * Fix issue where the publisher was broken on profile pages [#6503](https://github.com/diaspora/diaspora/pull/6503)
-* Limit flash message width on small devices [#6529](https://github.com/diaspora/diaspora/pull/6529)
+* Prevent participations being created for invalid interactions [#6552](https://github.com/diaspora/diaspora/pull/6552)
 
 ## Features
 
diff --git a/app/models/user/social_actions.rb b/app/models/user/social_actions.rb
index 2b3ff4a4a..b3a4c6b58 100644
--- a/app/models/user/social_actions.rb
+++ b/app/models/user/social_actions.rb
@@ -1,7 +1,8 @@
 module User::SocialActions
   def comment!(target, text, opts={})
-    update_or_create_participation!(target)
-    Comment::Generator.new(self, target, text).create!(opts)
+    Comment::Generator.new(self, target, text).create!(opts).tap do
+      update_or_create_participation!(target)
+    end
   end
 
   def participate!(target, opts={})
@@ -9,21 +10,23 @@ module User::SocialActions
   end
 
   def like!(target, opts={})
-    update_or_create_participation!(target)
-    Like::Generator.new(self, target).create!(opts)
+    Like::Generator.new(self, target).create!(opts).tap do
+      update_or_create_participation!(target)
+    end
   end
 
   def participate_in_poll!(target, answer, opts={})
-    update_or_create_participation!(target)
-    PollParticipation::Generator.new(self, target, answer).create!(opts)
+    PollParticipation::Generator.new(self, target, answer).create!(opts).tap do
+      update_or_create_participation!(target)
+    end
   end
 
   def reshare!(target, opts={})
-    update_or_create_participation!(target)
-    reshare = build_post(:reshare, :root_guid => target.guid)
-    reshare.save!
-    Postzord::Dispatcher.defer_build_and_post(self, reshare)
-    reshare
+    build_post(:reshare, :root_guid => target.guid).tap do |reshare|
+      reshare.save!
+      update_or_create_participation!(target)
+      Postzord::Dispatcher.defer_build_and_post(self, reshare)
+    end
   end
 
   def build_comment(options={})
diff --git a/spec/models/comment_spec.rb b/spec/models/comment_spec.rb
index 9d62b3046..c9631f928 100644
--- a/spec/models/comment_spec.rb
+++ b/spec/models/comment_spec.rb
@@ -77,6 +77,15 @@ describe Comment, :type => :model do
       participations = Participation.where(target_id: comment_alice.commentable_id, author_id: comment_alice.author_id)
       expect(participations.count).to eq(1)
     end
+
+    it "does not create a participation if comment validation failed" do
+      begin
+        alice.comment!(status_bob, " ")
+      rescue ActiveRecord::RecordInvalid
+      end
+      participations = Participation.where(target_id: status_bob, author_id: alice.person.id)
+      expect(participations.count).to eq(0)
+    end
   end
 
   describe "counter cache" do