diff --git a/code/modules/mob/living/carbon/human/life.dm b/code/modules/mob/living/carbon/human/life.dm
index 8a63f2b43db..0cd59c4d629 100644
--- a/code/modules/mob/living/carbon/human/life.dm
+++ b/code/modules/mob/living/carbon/human/life.dm
@@ -868,7 +868,7 @@
 	proc/handle_chemicals_in_body()
 		if(reagents)
 
-			var/alien //Not the best way to handle it, but neater than checking this for every single reagent proc.
+			var/alien = 0 //Not the best way to handle it, but neater than checking this for every single reagent proc.
 			if(species && species.name == "Diona")
 				alien = 1
 			else if(species && species.name == "Vox")
diff --git a/code/modules/mob/living/carbon/monkey/monkey.dm b/code/modules/mob/living/carbon/monkey/monkey.dm
index f780b790333..42fbb8fa02e 100644
--- a/code/modules/mob/living/carbon/monkey/monkey.dm
+++ b/code/modules/mob/living/carbon/monkey/monkey.dm
@@ -14,7 +14,7 @@
 	//var/uni_append = "12C4E2"                // Small appearance modifier for different species.
 	var/list/uni_append = list(0x12C,0x4E2)    // Same as above for DNA2.
 	var/update_muts = 1                        // Monkey gene must be set at start.
-	var/alien 									//Used for reagent metabolism.
+	var/alien = 0								//Used for reagent metabolism.
 
 /mob/living/carbon/monkey/tajara
 	name = "farwa"