diff --git a/code/modules/resleeving/resleeving_sickness.dm b/code/modules/resleeving/resleeving_sickness.dm
index 0084ee64ccd..c10b916841f 100644
--- a/code/modules/resleeving/resleeving_sickness.dm
+++ b/code/modules/resleeving/resleeving_sickness.dm
@@ -1,6 +1,7 @@
 /datum/modifier/resleeving_sickness
 	name = "resleeving sickness"
 	desc = "You feel rather weak, having been sleeved not so long ago."
+	stacks = MODIFIER_STACK_EXTEND
 
 	on_created_text = "<span class='warning'><font size='3'>You feel frail and unfocused.</font></span>"
 	on_expired_text = "<span class='notice'><font size='3'>You feel your resilience and focus return to you.</font></span>"