diff --git a/code/modules/language/language_holder.dm b/code/modules/language/language_holder.dm
index c1a336eb69..00f63510b6 100644
--- a/code/modules/language/language_holder.dm
+++ b/code/modules/language/language_holder.dm
@@ -134,7 +134,7 @@
 
 /datum/language_holder/synthetic
 	languages = list(/datum/language/common)
-	shadow_languages = list(/datum/language/common, /datum/language/machine, /datum/language/draconic)
+	shadow_languages = list(/datum/language/common, /datum/language/machine, /datum/language/draconic, /datum/language/slime)
 
 /datum/language_holder/empty
 	languages = list()