diff --git a/code/modules/power/gravitygenerator.dm b/code/modules/power/gravitygenerator.dm
index 872303d3e91..9f594b46052 100644
--- a/code/modules/power/gravitygenerator.dm
+++ b/code/modules/power/gravitygenerator.dm
@@ -364,7 +364,7 @@ var/const/GRAV_NEEDS_WRENCH = 3
 	var/turf/our_turf = get_turf(src)
 	for(var/mob/M in mob_list)
 		var/turf/their_turf = get_turf(M)
-		if(their_turf.z == our_turf.z)
+		if(their_turf && their_turf.z == our_turf.z)
 			M.update_gravity(M.mob_has_gravity())
 			if(M.client)
 				shake_camera(M, 15, 1)