diff --git a/code/__DEFINES/basic_mobs.dm b/code/__DEFINES/basic_mobs.dm
index c7275f7c423..b673d0e7a12 100644
--- a/code/__DEFINES/basic_mobs.dm
+++ b/code/__DEFINES/basic_mobs.dm
@@ -12,6 +12,8 @@
 #define FLAMMABLE_MOB (1<<3)
 /// Mob never takes damage from unarmed attacks
 #define IMMUNE_TO_FISTS (1<<4)
+/// Mob is immune to getting wet
+#define IMMUNE_TO_GETTING_WET (1<<5)
 
 /// Temporary trait applied when an attack forecast animation has completed
 #define TRAIT_BASIC_ATTACK_FORECAST "trait_basic_attack_forecast"
diff --git a/code/datums/status_effects/debuffs/fire_stacks.dm b/code/datums/status_effects/debuffs/fire_stacks.dm
index 76d5f8ec896..5bf8269bbbf 100644
--- a/code/datums/status_effects/debuffs/fire_stacks.dm
+++ b/code/datums/status_effects/debuffs/fire_stacks.dm
@@ -30,8 +30,7 @@
 		qdel(src)
 		return
 	if(isbasicmob(owner))
-		var/mob/living/basic/basic_owner = owner
-		if(!(basic_owner.basic_mob_flags & FLAMMABLE_MOB))
+		if(!check_basic_mob_immunity(owner))
 			qdel(src)
 			return
 
@@ -94,6 +93,10 @@
 	stacks = max(0, min(stack_limit, stacks + new_stacks))
 	cache_stacks()
 
+/// Checks if the applicable basic mob is immune to the status effect we're trying to apply. Returns TRUE if it is, FALSE if it isn't.
+/datum/status_effect/fire_handler/proc/check_basic_mob_immunity(mob/living/basic/basic_owner)
+	return (basic_owner.basic_mob_flags & FLAMMABLE_MOB)
+
 /**
  * Refresher for mob's fire_stacks
  */
@@ -287,3 +290,6 @@
 	if(particle_effect)
 		return
 	particle_effect = new(owner, /particles/droplets)
+
+/datum/status_effect/fire_handler/wet_stacks/check_basic_mob_immunity(mob/living/basic/basic_owner)
+	return !(basic_owner.basic_mob_flags & IMMUNE_TO_GETTING_WET)