diff --git a/stairsplus/microblocks.lua b/stairsplus/microblocks.lua
index 50d8487..0068d05 100644
--- a/stairsplus/microblocks.lua
+++ b/stairsplus/microblocks.lua
@@ -95,6 +95,7 @@ function stairsplus:register_micro(modname, subname, recipeitem, fields)
 		def.paramtype2 = def.paramtype2 or "facedir"
 		def.on_place = minetest.rotate_node
 		def.groups = stairsplus:prepare_groups(fields.groups)
+		def.groups.micro = 1
 		def.description = desc
 		if fields.drop and not (type(fields.drop) == "table") then
 			def.drop = modname.. ":micro_" ..fields.drop..alternate
diff --git a/stairsplus/panels.lua b/stairsplus/panels.lua
index 98e77fd..e37ad22 100644
--- a/stairsplus/panels.lua
+++ b/stairsplus/panels.lua
@@ -96,6 +96,7 @@ function stairsplus:register_panel(modname, subname, recipeitem, fields)
 		def.on_place = minetest.rotate_node
 		def.description = desc
 		def.groups = stairsplus:prepare_groups(fields.groups)
+		def.groups.panel = 1
 		if fields.drop and not (type(fields.drop) == "table") then
 			def.drop = modname.. ":panel_" ..fields.drop..alternate
 		end
diff --git a/stairsplus/slabs.lua b/stairsplus/slabs.lua
index ea9dbc5..773685c 100644
--- a/stairsplus/slabs.lua
+++ b/stairsplus/slabs.lua
@@ -96,6 +96,7 @@ function stairsplus:register_slab(modname, subname, recipeitem, fields)
 		def.paramtype2 = def.paramtype2 or "facedir"
 		def.on_place = minetest.rotate_node
 		def.groups = stairsplus:prepare_groups(fields.groups)
+		def.groups.slab = 1
 		if fields.drop and not (type(fields.drop) == "table") then
 			def.drop = modname.. ":slab_" .. fields.drop .. alternate
 		end
diff --git a/stairsplus/slopes.lua b/stairsplus/slopes.lua
index 7d18b3d..3621bb3 100644
--- a/stairsplus/slopes.lua
+++ b/stairsplus/slopes.lua
@@ -250,6 +250,7 @@ function stairsplus:register_slope(modname, subname, recipeitem, fields)
 		def.on_place = minetest.rotate_node
 		def.description = desc
 		def.groups = stairsplus:prepare_groups(fields.groups)
+		def.groups.slope = 1
 		if fields.drop and not (type(fields.drop) == "table") then
 			def.drop = modname.. ":slope_" ..fields.drop..alternate
 		end
diff --git a/stairsplus/stairs.lua b/stairsplus/stairs.lua
index 0291e7d..41d099d 100644
--- a/stairsplus/stairs.lua
+++ b/stairsplus/stairs.lua
@@ -136,6 +136,7 @@ function stairsplus:register_stair(modname, subname, recipeitem, fields)
 		def.on_place = minetest.rotate_node
 		def.description = desc
 		def.groups = stairsplus:prepare_groups(fields.groups)
+		def.groups.stair = 1
 		if fields.drop and not (type(fields.drop) == "table") then
 			def.drop = modname .. ":stair_" .. fields.drop .. alternate
 		end