diff --git a/lib/cache.rb b/lib/cache.rb
index de89def9f..5ed764832 100644
--- a/lib/cache.rb
+++ b/lib/cache.rb
@@ -35,6 +35,7 @@ write a cache
       Rails.cache.write(key.to_s, data, params)
     rescue => e
       Rails.logger.error "Can't write cache #{key}: #{e.inspect}"
+      Rails.logger.error e
     end
   end