diff --git a/app/assets/javascripts/app/views/karma/index.jst.eco b/app/assets/javascripts/app/views/karma/index.jst.eco
index aace3da94..b80ee0c9d 100644
--- a/app/assets/javascripts/app/views/karma/index.jst.eco
+++ b/app/assets/javascripts/app/views/karma/index.jst.eco
@@ -42,7 +42,7 @@
 
 <h2><%- @T('What affects your Zammad Karma?') %></h2>
 
-<p><%- @T('You accumulate "positive Karma" when you regularly answer and close tickets on time and when you use advanced features such as text modules, ticket reminders or tagging tickets. Zammad Karma will decrease when you have re-opend tickets, escalated tickets or tickets that are two or more days overdue.') %></p>
+<p><%- @T('You |accumulate positive Karma| when you regularly answer and close tickets on time and when you use advanced features such as text modules, ticket reminders or tagging tickets. Zammad |Karma will decrease| when you have re-opend tickets, escalated tickets or tickets that are two or more days overdue.') %></p>
 
 <!--
 <p><%- @T('You’re able to set goals regarding the number of tickets you want to answer or close you want to complete either daily or weekly. Reaching these self-set goals will result in bonus Karma. Zammad also tracks how many days/weeks you have attained your goals, and achieving ongoing "streaks" will similarly result in positive Karma.') %></p>
diff --git a/app/models/karma/activity_log.rb b/app/models/karma/activity_log.rb
index 161f7a495..404c3b43a 100644
--- a/app/models/karma/activity_log.rb
+++ b/app/models/karma/activity_log.rb
@@ -5,7 +5,7 @@ class Karma::ActivityLog < ApplicationModel
 
   self.table_name = 'karma_activity_logs'
 
-  def self.add(action, user, object, o_id)
+  def self.add(action, user, object, o_id, force = false)
     activity = Karma::Activity.lookup(name: action)
 
     if object
@@ -20,19 +20,24 @@ class Karma::ActivityLog < ApplicationModel
         o_id: o_id,
         activity_id: activity.id,
       ).find_by('created_at >= ?', Time.zone.now - activity.once_ttl.seconds)
-      return false if latest_activity
+      return false if !force && latest_activity
       score_total = 0
       if last_activity
         score_total = last_activity.score_total
       end
 
+      local_score_total = score_total + activity.score
+      if local_score_total < 0
+        local_score_total = 0
+      end
+
       Karma::ActivityLog.create(
         object_lookup_id: object_id,
         o_id: o_id,
         user_id: user.id,
         activity_id: activity.id,
         score: activity.score,
-        score_total: score_total + activity.score,
+        score_total: local_score_total,
       )
     end
 
diff --git a/test/unit/karma_test.rb b/test/unit/karma_test.rb
index f9cb9fb24..c161123f5 100644
--- a/test/unit/karma_test.rb
+++ b/test/unit/karma_test.rb
@@ -498,6 +498,22 @@ class KarmaTest < ActiveSupport::TestCase
     assert_equal(5 + 10 + 4, Karma.score_by_user(agent2))
     assert_equal(0, Karma.score_by_user(customer1))
 
+    # check min score
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    Karma::ActivityLog.add('ticket escalated', ticket2.owner, 'Ticket', ticket2.id, true)
+    assert_equal(0, Karma.score_by_user(agent1), 'block - score, min is 0')
+    assert_equal(5 + 10 + 4, Karma.score_by_user(agent2))
+    assert_equal(0, Karma.score_by_user(customer1))
+
+    Ticket.destroy_all
+
     # test score/level
     assert_equal('Beginner', Karma::User.level_by_score(0))
     assert_equal('Beginner', Karma::User.level_by_score(400))