Dark Souls 2 Undead Crypt Question

As you enter the long hallway before the fog gate you will be on top of some stairs. Instead of running right down them fall to either side. There is an opening under the stairs where a zombie rings the bell as long as he is alive. Kill him and the bell will not ring at all during your trip down the hallway to the boss! Be careful not to hit the bell while killing him though as this will spawn enemies.