diff --git a/code/controllers/subsystem/dynamic/dynamic_rulesets_midround.dm b/code/controllers/subsystem/dynamic/dynamic_rulesets_midround.dm
index 01eec4e1799..7f133e9231b 100644
--- a/code/controllers/subsystem/dynamic/dynamic_rulesets_midround.dm
+++ b/code/controllers/subsystem/dynamic/dynamic_rulesets_midround.dm
@@ -972,13 +972,15 @@
 	cost = 5
 	minimum_players = 40
 	repeatable = TRUE
+	signup_item_path = /obj/item/cosmic_skull
 	ruleset_lazy_templates = list(LAZY_TEMPLATE_KEY_VOIDWALKER_VOID)
 	/// The space turf we find in acceptable(), cached for ease
 	var/space_turf
 
 /datum/dynamic_ruleset/midround/from_ghosts/voidwalker/acceptable(population = 0, threat_level = 0)
 	space_turf = find_space_spawn()
-	if(!space_turf)
+	// Space only antag and will die on planetary gravity.
+	if(SSmapping.is_planetary() || !space_turf)
 		return FALSE
 	return ..()