diff --git a/lib/mongoid/log_subscriber.rb b/lib/mongoid/log_subscriber.rb
index 9493da2dc9..02c0ec1bd4 100644
--- a/lib/mongoid/log_subscriber.rb
+++ b/lib/mongoid/log_subscriber.rb
@@ -13,7 +13,14 @@ def query(event)
 
       payload = event.payload
       runtime = ("%.4fms" % event.duration)
-      debug(payload[:prefix], payload[:ops], runtime)
+      
+      if payload[:exception]
+        prefix = payload[:prefix] + " ERROR: " + payload[:exception].join(' - ')
+      else
+        prefix = payload[:prefix]
+      end
+
+      debug(prefix, payload[:ops], runtime)      
     end
 
     def query_cache(event)