diff --git a/app/controllers/admin/site_texts_controller.rb b/app/controllers/admin/site_texts_controller.rb
index 17c07262db3..d228229512f 100644
--- a/app/controllers/admin/site_texts_controller.rb
+++ b/app/controllers/admin/site_texts_controller.rb
@@ -44,6 +44,8 @@ class Admin::SiteTextsController < Admin::AdminController
   def update
     site_text = find_site_text
     site_text[:value] = params[:site_text][:value]
+    old_text = I18n.t(site_text[:id])
+    StaffActionLogger.new(current_user).log_site_text_change(site_text[:id], site_text[:value], old_text)
 
     TranslationOverride.upsert!(I18n.locale, site_text[:id], site_text[:value])
     render_serialized(site_text, SiteTextSerializer, root: 'site_text', rest_serializer: true)
@@ -51,8 +53,10 @@ class Admin::SiteTextsController < Admin::AdminController
 
   def revert
     site_text = find_site_text
+    old_text = I18n.t(site_text[:id])
     TranslationOverride.revert!(I18n.locale, site_text[:id])
     site_text = find_site_text
+    StaffActionLogger.new(current_user).log_site_text_change(site_text[:id], site_text[:value], old_text)
     render_serialized(site_text, SiteTextSerializer, root: 'site_text', rest_serializer: true)
   end
 
diff --git a/app/models/user_history.rb b/app/models/user_history.rb
index 038df0e9c2e..978ca6ee380 100644
--- a/app/models/user_history.rb
+++ b/app/models/user_history.rb
@@ -21,6 +21,7 @@ class UserHistory < ActiveRecord::Base
                           :change_site_setting,
                           :change_site_customization,
                           :delete_site_customization,
+                          :change_site_text,
                           :checked_for_custom_avatar, # not used anymore
                           :notified_about_avatar,
                           :notified_about_sequential_replies,
@@ -53,6 +54,7 @@ class UserHistory < ActiveRecord::Base
                         :change_site_setting,
                         :change_site_customization,
                         :delete_site_customization,
+                        :change_site_text,
                         :suspend_user,
                         :unsuspend_user,
                         :grant_badge,
diff --git a/app/services/staff_action_logger.rb b/app/services/staff_action_logger.rb
index f760aa5fdd1..c0766551024 100644
--- a/app/services/staff_action_logger.rb
+++ b/app/services/staff_action_logger.rb
@@ -134,6 +134,18 @@ class StaffActionLogger
     }))
   end
 
+  def log_site_text_change(subject, new_text, old_text, opts={})
+    raise Discourse::InvalidParameters.new(:subject) unless subject.present?
+    raise Discourse::InvalidParameters.new(:new_text) unless new_text.present?
+    raise Discourse::InvalidParameters.new(:old_text) unless old_text.present?
+    UserHistory.create( params(opts).merge({
+      action: UserHistory.actions[:change_site_text],
+      subject: subject,
+      previous_value: old_text,
+      new_value: new_text
+    }))
+  end
+
   def log_username_change(user, old_username, new_username, opts={})
     raise Discourse::InvalidParameters.new(:user) unless user
     UserHistory.create( params(opts).merge({
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index b44e809b708..c0526c7383a 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -2253,6 +2253,7 @@ en:
             change_site_setting: "change site setting"
             change_site_customization: "change site customization"
             delete_site_customization: "delete site customization"
+            change_site_text: "change site text"
             suspend_user: "suspend user"
             unsuspend_user: "unsuspend user"
             grant_badge: "grant badge"
diff --git a/spec/controllers/admin/site_texts_controller_spec.rb b/spec/controllers/admin/site_texts_controller_spec.rb
index 1ec7ad1aa7b..557646000fb 100644
--- a/spec/controllers/admin/site_texts_controller_spec.rb
+++ b/spec/controllers/admin/site_texts_controller_spec.rb
@@ -75,6 +75,11 @@ describe Admin::SiteTextsController do
         xhr :put, :update, id: 'made_up_no_key_exists', site_text: {value: 'hello'}
         expect(response).not_to be_success
       end
+
+      it 'logs the change' do
+        StaffActionLogger.any_instance.expects(:log_site_text_change).once
+        xhr :put, :update, id: 'title', site_text: {value: 'hello'}
+      end
     end
   end
 
diff --git a/spec/services/staff_action_logger_spec.rb b/spec/services/staff_action_logger_spec.rb
index b6f93bc3359..d1c7422c7cf 100644
--- a/spec/services/staff_action_logger_spec.rb
+++ b/spec/services/staff_action_logger_spec.rb
@@ -173,6 +173,18 @@ describe StaffActionLogger do
     end
   end
 
+  describe "log_site_text_change" do
+    it "raises an error when params are invalid" do
+      expect { logger.log_site_text_change(nil, 'new text', 'old text') }.to raise_error(Discourse::InvalidParameters)
+      expect { logger.log_site_text_change('created', nil, 'old text') }.to raise_error(Discourse::InvalidParameters)
+      expect { logger.log_site_text_change('created', 'new text', nil) }.to raise_error(Discourse::InvalidParameters)
+    end
+
+    it "creates a new UserHistory record" do
+      expect { logger.log_site_text_change('created', 'new text', 'old text') }.to change { UserHistory.count }.by(1)
+    end
+  end
+
   describe "log_user_suspend" do
     let(:user) { Fabricate(:user, suspended_at: 10.minutes.ago, suspended_till: 1.day.from_now) }