diff --git a/mods/ENTITIES/mcl_mobs/physics.lua b/mods/ENTITIES/mcl_mobs/physics.lua
index 7db0e8166..99a4b1b10 100644
--- a/mods/ENTITIES/mcl_mobs/physics.lua
+++ b/mods/ENTITIES/mcl_mobs/physics.lua
@@ -240,11 +240,13 @@ end
 -- Relative turn, primarily for random turning
 -- @param dtime deprecated: ignored now, because of smooth rotations
 function mob_class:turn_by(angle, delay, dtime)
+	if self.noyaw then return end -- shulker
 	return self:set_yaw((self.object:get_yaw() or 0) + angle, delay, dtime)
 end
 -- Turn into a direction (e.g., to the player, or away)
 -- @param dtime deprecated: ignored now, because of smooth rotations
 function mob_class:turn_in_direction(dx, dz, delay, dtime)
+	if self.noyaw then return end -- shulker
 	if not self.rotate then self.rotate = 0 end
 	if abs(dx) == 0 and abs(dz) == 0 then return self.object:get_yaw() + self.rotate end
 	return self:set_yaw(-atan2(dx, dz) - self.rotate, delay, dtime) + self.rotate