diff --git a/lib/mongo/cursor.rb b/lib/mongo/cursor.rb
index 2a08349..13b60bb 100644
--- a/lib/mongo/cursor.rb
+++ b/lib/mongo/cursor.rb
@@ -207,7 +207,7 @@ module XGen
           begin
             buf.put_array(@db.socket.recv(size-4).unpack("C*"), 4)
           rescue => ex
-            raise "#{ex.class}: #{ex.message} ***size was #{size}***"
+            raise "#{ex.class}: #{ex.message} ***size was #{size}*res_flags #{@result_flags}*cursor_id #{@cursor_id}*starting_from #{@starting_from}*n_returned #{@n_returned}***"
           end
           @n_remaining -= 1
           buf.rewind