diff --git a/code/datums/diseases/_disease.dm b/code/datums/diseases/_disease.dm
index 448de671f09..d099da71bf9 100644
--- a/code/datums/diseases/_disease.dm
+++ b/code/datums/diseases/_disease.dm
@@ -75,7 +75,7 @@ GLOBAL_LIST_INIT(diseases, subtypesof(/datum/disease))
 	var/cure = has_cure()
 
 	if(carrier && !cure)
-		return
+		return TRUE
 
 	stage = min(stage, max_stages)