diff --git a/code/game/atoms.dm b/code/game/atoms.dm
index e9957fdae2..65edf9c98e 100644
--- a/code/game/atoms.dm
+++ b/code/game/atoms.dm
@@ -169,7 +169,7 @@
  * * [/turf/open/space/proc/Initialize]
  */
 /atom/proc/Initialize(mapload, ...)
-	// SHOULD_NOT_SLEEP(TRUE)
+	SHOULD_NOT_SLEEP(TRUE)
 	SHOULD_CALL_PARENT(TRUE)
 	if(flags_1 & INITIALIZED_1)
 		stack_trace("Warning: [src]([type]) initialized multiple times!")