diff --git a/abms.lua b/abms.lua
index 6acdccf..74fd235 100644
--- a/abms.lua
+++ b/abms.lua
@@ -846,7 +846,7 @@ local function destroy(pos, cid)
 	end
 
 	local def = cid_data[cid]
-	if not def or minetest.is_protected(pos, "") then
+	if not (def and def.flammable and def.flammable > 0 and not minetest.is_protected(pos, "")) then
 		return
 	end