diff --git a/app/models/tag.rb b/app/models/tag.rb
index 242f4fccd..5f848236f 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -75,6 +75,8 @@ class Tag < ApplicationModel
 
     def self.tag_item_lookup( name )
 
+      name = name.downcase
+
       # use cache
       return @@cache_item[ name ] if @@cache_item[ name ]
 
diff --git a/test/unit/tag_test.rb b/test/unit/tag_test.rb
index df870f5c2..e9dfa346e 100644
--- a/test/unit/tag_test.rb
+++ b/test/unit/tag_test.rb
@@ -59,7 +59,7 @@ class TagTest < ActiveSupport::TestCase
       # test 4
       {
         :tag_add => {
-          :item          => 'tagöäüß2',
+          :item          => 'Tagöäüß2',
           :object        => 'Object2',
           :o_id          => 123,
           :created_by_id => 1