diff --git a/code/game/machinery/outpost_electrolyzer.dm b/code/game/machinery/outpost_electrolyzer.dm
index 0a60eba93e3a..0067bd7150c1 100644
--- a/code/game/machinery/outpost_electrolyzer.dm
+++ b/code/game/machinery/outpost_electrolyzer.dm
@@ -38,7 +38,7 @@
 	. = ..()
 	update_appearance()
 	var/static/list/loc_connections = list(
-		COMSIG_ATOM_ENTERED = .proc/on_entered,
+		COMSIG_ATOM_ENTERED = PROC_REF(on_entered),
 	)
 	AddElement(/datum/element/connect_loc, loc_connections)