diff --git a/GROUPS.md b/GROUPS.md
index b7264abd92..41b0a0d7ae 100644
--- a/GROUPS.md
+++ b/GROUPS.md
@@ -83,6 +83,7 @@ These groups are used mostly for informational purposes
 * `solid=1`: Solid full-cube block (automatically assigned)
 * `opaque=1`: Opaque block (automatically assigned)
 * `not_solid=1`: Block is sold (only assign this group for nodes which are automatically detected as “solid” in error
+* `fire=1`: Fire
 * `water=1`: Water
 * `lava=1`: Lava
 * `torch`: Torch or torch-like node
diff --git a/mods/ITEMS/mcl_fire/init.lua b/mods/ITEMS/mcl_fire/init.lua
index 9bd130405a..eddf06dc95 100644
--- a/mods/ITEMS/mcl_fire/init.lua
+++ b/mods/ITEMS/mcl_fire/init.lua
@@ -35,7 +35,7 @@ minetest.register_node("mcl_fire:fire", {
 	buildable_to = true,
 	sunlight_propagates = true,
 	damage_per_second = 1,
-	groups = {igniter = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston=1},
+	groups = {igniter = 1, fire = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston=1},
 	on_timer = function(pos)
 		local f = minetest.find_node_near(pos, 1, {"group:flammable"})
 		if not f then
@@ -76,7 +76,7 @@ minetest.register_node("mcl_fire:eternal_fire", {
 	buildable_to = true,
 	sunlight_propagates = true,
 	damage_per_second = 1,
-	groups = {igniter = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston = 1},
+	groups = {igniter = 1, fire = 1, dig_immediate = 3, not_in_creative_inventory = 1, dig_by_piston = 1},
 	sounds = {},
 	drop = "",
 	_mcl_blast_resistance = 0,
@@ -270,7 +270,7 @@ else -- Fire enabled
 	minetest.register_abm({
 		label = "Remove flammable nodes",
 		nodenames = {"mcl_fire:fire"},
-		neighbors = "group:flammable",
+		neighbors = {"group:fire"},
 		interval = 5,
 		chance = 18,
 		catch_up = false,