diff --git a/app/models/issue.rb b/app/models/issue.rb
index b6eda17..827c6f7 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -86,10 +86,12 @@ class Issue < ActiveRecord::Base
       }
       # custom fields changes
       custom_values.each {|c|
+        next if (@custom_values_before_change[c.custom_field_id]==c.value ||
+                  (@custom_values_before_change[c.custom_field_id].blank? && c.value.blank?))
         @current_journal.details << JournalDetail.new(:property => 'cf', 
                                                       :prop_key => c.custom_field_id,
                                                       :old_value => @custom_values_before_change[c.custom_field_id],
-                                                      :value => c.value) unless @custom_values_before_change[c.custom_field_id]==c.value
+                                                      :value => c.value)
       }      
       @current_journal.save unless @current_journal.details.empty? and @current_journal.notes.empty?
     end