diff --git a/code/__DEFINES/mobs.dm b/code/__DEFINES/mobs.dm
index 341a0408..c5a2f65a 100644
--- a/code/__DEFINES/mobs.dm
+++ b/code/__DEFINES/mobs.dm
@@ -39,6 +39,7 @@
 #define MOB_ORGANIC 	"organic"
 #define MOB_INORGANIC 	"inorganic"
 #define MOB_ROBOTIC 	"robotic"
+#define MOB_SILICON     "silicon"
 #define MOB_UNDEAD		"undead"
 #define MOB_HUMANOID 	"humanoid"
 #define MOB_BUG 		"bug"
diff --git a/code/modules/mob/living/silicon/silicon.dm b/code/modules/mob/living/silicon/silicon.dm
index 1a0d9f8a..51e8967a 100644
--- a/code/modules/mob/living/silicon/silicon.dm
+++ b/code/modules/mob/living/silicon/silicon.dm
@@ -10,7 +10,7 @@
 	bubble_icon = "machine"
 	weather_immunities = list("ash")
 	possible_a_intents = list(INTENT_HELP, INTENT_HARM)
-	mob_biotypes = list(MOB_ROBOTIC)
+	mob_biotypes = list(MOB_SILICON)
 	rad_flags = RAD_PROTECT_CONTENTS | RAD_NO_CONTAMINATE
 	speech_span = SPAN_ROBOT