diff --git a/app/models/post.rb b/app/models/post.rb
index 5e220246135..ac1a9659c8a 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -117,7 +117,8 @@ class Post < ActiveRecord::Base
                                  flag_threshold_reached_again: 2,
                                  new_user_spam_threshold_reached: 3,
                                  flagged_by_tl3_user: 4,
-                                 email_spam_header_found: 5)
+                                 email_spam_header_found: 5,
+                                 flagged_by_tl4_user: 6)
   end
 
   def self.types
diff --git a/app/models/post_action.rb b/app/models/post_action.rb
index 1f0fe2ddcce..2fc39f6f2af 100644
--- a/app/models/post_action.rb
+++ b/app/models/post_action.rb
@@ -583,13 +583,19 @@ class PostAction < ActiveRecord::Base
 
       hide_post!(post, post_action_type, Post.hidden_reasons[:flagged_by_tl3_user])
 
-    elsif PostActionType.auto_action_flag_types.include?(post_action_type) &&
-          SiteSetting.flags_required_to_hide_post > 0
+    elsif PostActionType.auto_action_flag_types.include?(post_action_type)
 
-      _old_flags, new_flags = PostAction.flag_counts_for(post.id)
+      if acting_user.has_trust_level?(TrustLevel[4]) &&
+         post.user&.trust_level != TrustLevel[4]
 
-      if new_flags >= SiteSetting.flags_required_to_hide_post
-        hide_post!(post, post_action_type, guess_hide_reason(post))
+        hide_post!(post, post_action_type, Post.hidden_reasons[:flagged_by_tl4_user])
+      elsif SiteSetting.flags_required_to_hide_post > 0
+
+        _old_flags, new_flags = PostAction.flag_counts_for(post.id)
+
+        if new_flags >= SiteSetting.flags_required_to_hide_post
+          hide_post!(post, post_action_type, guess_hide_reason(post))
+        end
       end
     end
   end
diff --git a/spec/models/post_action_spec.rb b/spec/models/post_action_spec.rb
index c8f5d50f24f..adaa78f1227 100644
--- a/spec/models/post_action_spec.rb
+++ b/spec/models/post_action_spec.rb
@@ -501,6 +501,37 @@ describe PostAction do
       expect(post.hidden_reason_id).to eq(Post.hidden_reasons[:flagged_by_tl3_user])
     end
 
+    it "hide non-tl4 posts that are flagged by a tl4 user" do
+      SiteSetting.site_contact_username = admin.username
+
+      post_action_type = PostActionType.types[:spam]
+      tl4_user = Fabricate(:trust_level_4)
+
+      user = Fabricate(:leader)
+      post = create_post(user: user)
+
+      PostAction.act(tl4_user, post, post_action_type)
+
+      post.reload
+
+      expect(post.hidden).to be_truthy
+      expect(post.hidden_at).to be_present
+      expect(post.hidden_reason_id).to eq(Post.hidden_reasons[:flagged_by_tl4_user])
+
+      post = create_post(user: user)
+      PostAction.act(Fabricate(:leader), post, post_action_type)
+      post.reload
+
+      expect(post.hidden).to be_falsey
+
+      user = Fabricate(:trust_level_4)
+      post = create_post(user: user)
+      PostAction.act(tl4_user, post, post_action_type)
+      post.reload
+
+      expect(post.hidden).to be_falsey
+    end
+
     it "can flag the topic instead of a post" do
       post1 = create_post
       _post2 = create_post(topic: post1.topic)