It won't automatically apply to 1888 since it was made from 1886 and 1887 added ~10 lines to mob.cpp. It's a simple change though, just open mob.cpp, go to line 675 which should be right before Mob::CreateSpawnPacket and add the Mob::GetArchetype() function there right above it.
If you really wanted to, you could change the line in the patch file like this:
--- zone/mob.cpp (revision 187)
+++ zone/mob.cpp (working copy)
@@ -673,6 +673,53 @@
And it will apply too.
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