diff --git a/code/game/objects/effects/spiders.dm b/code/game/objects/effects/spiders.dm
index f7c44dd2af..d2c4aa98e9 100644
--- a/code/game/objects/effects/spiders.dm
+++ b/code/game/objects/effects/spiders.dm
@@ -156,7 +156,7 @@
 	pixel_y = rand(6,-6)
 	START_PROCESSING(SSobj, src)
 	//50% chance to grow up
-	if(!istype(src, /obj/effect/spider/spiderling/non_growing) && prob(50))
+	if(amount_grow != -1 && prob(50))
 		amount_grown = 1
 	get_light_and_color(parent)
 	. = ..(ml)