diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 4c8d2f0..e09a735 100644
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -1,5 +1,8 @@
 -- mods/default/functions.lua
 
+-- Check for a volume intersecting protection
+local is_50 = minetest.has_feature("object_use_texture_alpha") or nil
+
 --
 -- Sounds
 --
@@ -488,6 +491,9 @@ minetest.register_abm({
 function default.intersects_protection(minp, maxp, player_name, interval)
 	-- 'interval' is the largest allowed interval for the 3D lattice of checks
 
+if is_50 then
+	return minetest.is_area_protected(minp, maxp, player_name, interval)
+else
 	-- Compute the optimal float step 'd' for each axis so that all corners and
 	-- borders are checked. 'd' will be smaller or equal to 'interval'.
 	-- Subtracting 1e-4 ensures that the max co-ordinate will be reached by the
@@ -518,6 +524,9 @@ function default.intersects_protection(minp, maxp, player_name, interval)
 	end
 
 	return false
+
+end
+
 end