diff --git a/app/controllers/topics_controller.rb b/app/controllers/topics_controller.rb
index f03bdaca8d0..6b945d365f7 100644
--- a/app/controllers/topics_controller.rb
+++ b/app/controllers/topics_controller.rb
@@ -1186,6 +1186,13 @@ class TopicsController < ApplicationController
 
     topic.set_or_create_timer(slow_mode_type, time, by_user: timer&.user)
 
+    StaffActionLogger.new(current_user).log_topic_slow_mode(
+      topic,
+      enabled:,
+      seconds: params[:seconds],
+      until: time,
+    )
+
     head :ok
   end
 
diff --git a/app/models/user_history.rb b/app/models/user_history.rb
index 4377ef00c42..873fa573176 100644
--- a/app/models/user_history.rb
+++ b/app/models/user_history.rb
@@ -146,6 +146,8 @@ class UserHistory < ActiveRecord::Base
         delete_watched_word_group: 107,
         redirected_to_required_fields: 108,
         filled_in_required_fields: 109,
+        topic_slow_mode_set: 110,
+        topic_slow_mode_removed: 111,
       )
   end
 
@@ -254,6 +256,8 @@ class UserHistory < ActiveRecord::Base
       create_watched_word_group
       update_watched_word_group
       delete_watched_word_group
+      topic_slow_mode_set
+      topic_slow_mode_removed
     ]
   end
 
diff --git a/app/services/staff_action_logger.rb b/app/services/staff_action_logger.rb
index b52cc2602bc..010573c813b 100644
--- a/app/services/staff_action_logger.rb
+++ b/app/services/staff_action_logger.rb
@@ -204,6 +204,21 @@ class StaffActionLogger
     )
   end
 
+  def log_topic_slow_mode(topic, opts = {})
+    raise Discourse::InvalidParameters.new(:topic) unless topic && topic.is_a?(Topic)
+
+    details = opts[:enabled] ? ["interval: #{opts[:seconds]}", "until: #{opts[:until]}"] : []
+
+    UserHistory.create!(
+      params(opts).merge(
+        action:
+          UserHistory.actions[opts[:enabled] ? :topic_slow_mode_set : :topic_slow_mode_removed],
+        topic_id: topic.id,
+        details: details.join("\n"),
+      ),
+    )
+  end
+
   def log_post_staff_note(post, opts = {})
     raise Discourse::InvalidParameters.new(:post) unless post && post.is_a?(Post)
 
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 4e7c8351a19..76a53f9f953 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -6196,6 +6196,8 @@ en:
             create_flag: "create flag"
             update_flag: "update flag"
             delete_flag: "delete flag"
+            topic_slow_mode_set: "set topic slow mode"
+            topic_slow_mode_removed: "remove topic slow mode"
         screened_emails:
           title: "Screened Emails"
           description: "When someone tries to create a new account, the following email addresses will be checked and the registration will be blocked, or some other action performed."
diff --git a/spec/requests/topics_controller_spec.rb b/spec/requests/topics_controller_spec.rb
index b3bc9de4cbe..224a85c2015 100644
--- a/spec/requests/topics_controller_spec.rb
+++ b/spec/requests/topics_controller_spec.rb
@@ -5031,6 +5031,26 @@ RSpec.describe TopicsController do
         expect(execute_at).to eq(updated_timestamp)
       end
     end
+
+    describe "changes slow mode" do
+      before { sign_in(admin) }
+
+      it "should create a staff log entry" do
+        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "3600" }
+
+        log = UserHistory.last
+        expect(log.acting_user_id).to eq(admin.id)
+        expect(log.topic_id).to eq(topic.id)
+        expect(log.action).to eq(UserHistory.actions[:topic_slow_mode_set])
+
+        put "/t/#{topic.id}/slow_mode.json", params: { seconds: "0" }
+
+        log = UserHistory.last
+        expect(log.acting_user_id).to eq(admin.id)
+        expect(log.topic_id).to eq(topic.id)
+        expect(log.action).to eq(UserHistory.actions[:topic_slow_mode_removed])
+      end
+    end
   end
 
   describe "#invite" do