diff --git a/code/_helpers/unsorted.dm b/code/_helpers/unsorted.dm
index 53af5c50bc..9a22b1ec4f 100644
--- a/code/_helpers/unsorted.dm
+++ b/code/_helpers/unsorted.dm
@@ -821,7 +821,9 @@ proc/GaussRandRound(var/sigma,var/roundto)
 					for(var/mob/M in T)
 						if(istype(M, /mob/observer/eye)) continue // If we need to check for more mobs, I'll add a variable
 						M.loc = X
-						M.check_shadow() // Need to check their Z-shadow, which is normally done in forceMove().
+						if(istype(M, /mob/living)
+							var/mob/living/LM = M
+							LM.check_shadow() // Need to check their Z-shadow, which is normally done in forceMove().
 
 					if(shuttlework)
 						var/turf/simulated/shuttle/SS = T