diff --git a/api.lua b/api.lua
index 0b32b23..e2da1f5 100644
--- a/api.lua
+++ b/api.lua
@@ -14,7 +14,7 @@ local use_vh1 = minetest.get_modpath("visual_harm_1ndicators")
 -- Global
 mobs = {
 	mod = "redo",
-	version = "20240121",
+	version = "20240126",
 	translate = S,
 	invis = minetest.global_exists("invisibility") and invisibility or {},
 	node_snow = minetest.registered_aliases["mapgen_snow"]
@@ -146,6 +146,7 @@ mobs.mob_class = {
 	lava_damage = 4,
 	fire_damage = 4,
 	air_damage = 0,
+	node_damage = true,
 	suffocation = 2,
 	fall_damage = 1,
 	fall_speed = -10, -- must be lower than -2 (default: -10)
@@ -1088,7 +1089,7 @@ function mob_class:do_env_damage()
 		end
 
 	-- damage_per_second node check (not fire and lava)
-	elseif nodef.damage_per_second and nodef.damage_per_second ~= 0
+	elseif self.node_damage and nodef.damage_per_second and nodef.damage_per_second ~= 0
 	and nodef.groups.lava == nil and nodef.groups.fire == nil then
 
 		self.health = self.health - nodef.damage_per_second
@@ -3622,6 +3623,7 @@ minetest.register_entity(":" .. name, setmetatable({
 	lava_damage = def.lava_damage,
 	fire_damage = def.fire_damage,
 	air_damage = def.air_damage,
+	node_damage = def.node_damage,
 	suffocation = def.suffocation,
 	fall_damage = def.fall_damage,
 	fall_speed = def.fall_speed,
diff --git a/api.txt b/api.txt
index 8f29db4..9bdac61 100644
--- a/api.txt
+++ b/api.txt
@@ -83,6 +83,8 @@ functions needed for the mob to work properly which contains the following:
    'lava_damage'   holds the damage per second inflicted to mobs when standing
                    in lava.
    'fire_damage'   holds the damage per second inflicted to mobs when standing
+   'node_damage'   True by default, will harm mobs when inside damage_per_second
+                   nodes.
                    in fire.
 
    'light_damage'  holds the damage per second inflicted to mobs when light
diff --git a/readme.MD b/readme.MD
index 233d090..aed0801 100644
--- a/readme.MD
+++ b/readme.MD
@@ -31,6 +31,7 @@ https://forum.minetest.net/viewtopic.php?f=11&t=9917
 * Added self.attack_patience value so mobs stop attacking unseen players
 * Added self.homing so that arrows follow player when visible
 * Added support for Visual Harm 1ndicators mod to show health bars
+* Added self.node_damage flag which is true by default to enable damage_per_second node damage
 
 ### Version 1.60