diff --git a/app/helpers/dams_objects_helper.rb b/app/helpers/dams_objects_helper.rb
index 6b196c26e..be2474b4b 100644
--- a/app/helpers/dams_objects_helper.rb
+++ b/app/helpers/dams_objects_helper.rb
@@ -663,7 +663,7 @@ def encrypt_stream_name( pid, fid, ip )
   #---
 
   def secure_token(field_data, obj_id, cmp_id, base_url)
-    file_name = grab_file_name(field_data, cmp_id)
+    file_name = audio_video_file_name(field_data, cmp_id)
     return nil unless file_name
     end_time = secure_token_end_time
     token_hash = secure_token_hash(end_time, file_name, obj_id, base_url)
@@ -687,7 +687,7 @@ def secure_token_hash(end_time, file_name, obj_id, base_url)
     token_params = token_params.sort
     stream = base_url.sub(%r{.*?\/}, '')
     obj_path = obj_id.scan(/.{1,2}/).join('/')
-    hash_in = "#{stream}#{obj_path}/20775-#{obj_id}-#{file_name}?#{token_params.join('&')}"
+    hash_in = "#{stream}#{obj_path}/#{ark_naan}-#{obj_id}-#{file_name}?#{token_params.join('&')}"
     hash_out = Digest::SHA2.new(256).digest(hash_in.to_s)
     hash_out = Base64.encode64(hash_out).to_s.strip
     matchers = { '+' => '-', '/' => '_' }
@@ -705,10 +705,10 @@ def secure_token_hash(end_time, file_name, obj_id, base_url)
   #---
 
   def secure_token_base_url(field_data, obj_id, cmp_id, base_url)
-    file_name = grab_file_name(field_data, cmp_id)
+    file_name = audio_video_file_name(field_data, cmp_id)
     return nil unless file_name
     obj_path = obj_id.scan(/.{1,2}/).join('/')
-    "#{base_url}#{obj_path}/20775-#{obj_id}-#{file_name}".html_safe
+    "#{base_url}#{obj_path}/#{ark_naan}-#{obj_id}-#{file_name}".html_safe
   end
 
   #---
@@ -719,7 +719,7 @@ def secure_token_base_url(field_data, obj_id, cmp_id, base_url)
   # @return string or nil
   #---
 
-  def grab_file_name(field_data, cmp_id)
+  def audio_video_file_name(field_data, cmp_id)
     return nil unless field_data
     field_data.each do |datum|
       files = JSON.parse(datum)
@@ -730,6 +730,8 @@ def grab_file_name(field_data, cmp_id)
     end
   end
 
+  def ark_naan() Rails.configuration.id_namespace.sub(%r{.*ark:\/}, '')[0..4] end
+
   #---
   # Creates Wowza Token End Time
   #
diff --git a/spec/helpers/dams_object_helper_spec.rb b/spec/helpers/dams_object_helper_spec.rb
index 18e7f0c7c..f5412d5df 100644
--- a/spec/helpers/dams_object_helper_spec.rb
+++ b/spec/helpers/dams_object_helper_spec.rb
@@ -22,7 +22,7 @@
     
     it 'builds secure token base URL' do
       base_url = helper.secure_token_base_url(@field_data, @obj_id, @cmp_id, Rails.configuration.secure_token_audio_baseurl)
-      expect(base_url).to include "#{Rails.configuration.secure_token_audio_baseurl}xy/76/12/55/7h/20775-xy7612557h-0-2.mp3"
+      expect(base_url).to include "#{Rails.configuration.secure_token_audio_baseurl}xy/76/12/55/7h/#{helper.ark_naan}-xy7612557h-0-2.mp3"
     end
   end
 end
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