diff -r b4e59a60b447 -r 03d855015db8 vendor/plugins/redmine_tags/lib/redmine_tags/patches/project_patch.rb
--- a/vendor/plugins/redmine_tags/lib/redmine_tags/patches/project_patch.rb
+++ b/vendor/plugins/redmine_tags/lib/redmine_tags/patches/project_patch.rb
@@ -65,7 +65,7 @@
           options = {}
           visible   = ARCondition.new
                   
-          visible << ["#{Project.table_name}.is_public = \"1\""]
+          visible << ["#{Project.table_name}.is_public = '1'"]
 
           if name_like
             visible << ["#{ActsAsTaggableOn::Tag.table_name}.name LIKE ?", "%#{name_like.downcase}%"]