diff --git a/code/game/turfs/simulated/walls_indestructible.dm b/code/game/turfs/simulated/walls_indestructible.dm
index 5d3b7011e70..8fd29321eeb 100644
--- a/code/game/turfs/simulated/walls_indestructible.dm
+++ b/code/game/turfs/simulated/walls_indestructible.dm
@@ -12,6 +12,9 @@
 /turf/simulated/wall/indestructible/welder_act()
 	return
 
+/turf/simulated/wall/indestructible/thermitemelt(mob/user, speed)
+	return
+
 /turf/simulated/wall/indestructible/ex_act(severity)
 	return