diff --git a/mods/ITEMS/mcl_stairs/api.lua b/mods/ITEMS/mcl_stairs/api.lua
index b28d2d2450..9f396473b2 100644
--- a/mods/ITEMS/mcl_stairs/api.lua
+++ b/mods/ITEMS/mcl_stairs/api.lua
@@ -143,7 +143,7 @@ function mcl_stairs.register_stair(subname, recipeitem, groups, images, descript
 					node.param2 = node.param2 + 20
 				end
 				minetest.set_node(pos, node)
-				return false
+				return true
 			end
 		end,
 		_mcl_hardness = hardness,
@@ -262,6 +262,15 @@ function mcl_stairs.register_slab(subname, recipeitem, groups, images, descripti
 		end,
 		_mcl_hardness = hardness,
 		_mcl_other_slab_half = upper_slab,
+		on_rotate = function(pos, node, user, mode, param2)
+			-- Flip slab
+			if mode == screwdriver.ROTATE_AXIS then
+				node.name = upper_slab
+				minetest.set_node(pos, node)
+				return true
+			end
+			return false
+		end,
 	}
 
 	minetest.register_node(":"..lower_slab, slabdef)
@@ -280,6 +289,15 @@ function mcl_stairs.register_slab(subname, recipeitem, groups, images, descripti
 	topdef._doc_items_usagehelp = nil
 	topdef.drop = lower_slab
 	topdef._mcl_other_slab_half = lower_slab
+	topdef.on_rotate = function(pos, node, user, mode, param2)
+		-- Flip slab
+		if mode == screwdriver.ROTATE_AXIS then
+			node.name = lower_slab
+			minetest.set_node(pos, node)
+			return true
+		end
+		return false
+	end
 	topdef.node_box = {
 		type = "fixed",
 		fixed = {-0.5, 0, -0.5, 0.5, 0.5, 0.5},