diff --git a/app/models/ability.rb b/app/models/ability.rb
index 9032038a1..a29f09a60 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -66,10 +66,15 @@ class Ability
         cannot :hide, User, id: user.id
       end
 
+      if user.moderator?
+        can :comment_as_moderator, [Debate, Comment]
+      end
+
       if user.administrator?
         can :restore, Comment
         can :restore, Debate
         can :restore, User
+        can :comment_as_administrator, [Debate, Comment]
       end
     end
   end
diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index 1ff4933b0..ff3e3800c 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -22,13 +22,15 @@ describe Ability do
     it { should be_able_to(:show, debate) }
     it { should be_able_to(:vote, debate) }
 
-
     it { should be_able_to(:show, user) }
     it { should be_able_to(:edit, user) }
 
     it { should be_able_to(:create, Comment) }
     it { should be_able_to(:vote, Comment) }
 
+    it { should_not be_able_to(:comment_as_administrator, debate) }
+    it { should_not be_able_to(:comment_as_moderator, debate) }
+
     describe 'flagging content as inappropiate' do
       it { should be_able_to(:flag_as_inappropiate, debate) }
       it { should_not be_able_to(:undo_flag_as_inappropiate, debate) }
@@ -158,6 +160,9 @@ describe Ability do
       it { should_not be_able_to(:restore, comment) }
       it { should_not be_able_to(:restore, debate) }
       it { should_not be_able_to(:restore, other_user) }
+
+      it { should be_able_to(:comment_as_moderator, debate) }
+      it { should_not be_able_to(:comment_as_administrator, debate) }
     end
   end
 
@@ -173,5 +178,8 @@ describe Ability do
     it { should be_able_to(:restore, comment) }
     it { should be_able_to(:restore, debate) }
     it { should be_able_to(:restore, other_user) }
+
+    it { should be_able_to(:comment_as_administrator, debate) }
+    it { should_not be_able_to(:comment_as_moderator, debate) }
   end
 end