diff --git a/app/models/concerns/redis_cacheable.rb b/app/models/concerns/redis_cacheable.rb
index b5425295130..3bdc1330d23 100644
--- a/app/models/concerns/redis_cacheable.rb
+++ b/app/models/concerns/redis_cacheable.rb
@@ -48,7 +48,7 @@ module RedisCacheable
 
   def cast_value_from_cache(attribute, value)
     if Gitlab.rails5?
-      self.class.type_for_attribute(attribute).cast(value)
+      self.class.type_for_attribute(attribute.to_s).cast(value)
     else
       self.class.column_for_attribute(attribute).type_cast_from_database(value)
     end