diff --git a/init.lua b/init.lua
index 0869012..c5a0c97 100644
--- a/init.lua
+++ b/init.lua
@@ -13,6 +13,7 @@ minetest.register_node("pseudonodes:pseudo_block", {
 	tiles = { "pseudonodes_pseudo_block.png", "pseudonodes_nothing.png" },
 	inventory_image = minetest.inventorycube("pseudonodes_pseudo_block.png"),
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	sounds = { dig = { name="", gain = 0 } },
@@ -28,6 +29,7 @@ minetest.register_node("pseudonodes:replacable_pseudo_block", {
 	tiles = { "pseudonodes_replacable_pseudo_block.png", "pseudonodes_nothing.png" },
 	inventory_image = minetest.inventorycube("pseudonodes_replacable_pseudo_block.png"),
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	sounds = { dig = { name="", gain = 0 } },
@@ -42,6 +44,7 @@ minetest.register_node("pseudonodes:replacable_block", {
 	description = S("replacable block"),
 	tiles = { "pseudonodes_replacable_block.png" },
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	walkable = true,
 	buildable_to = true,
 	sounds = { dig = { name="", gain = 0 } },
@@ -63,6 +66,7 @@ minetest.register_node("pseudonodes:pseudo_block_timer", {
 	},
 	inventory_image = minetest.inventorycube("pseudonodes_pseudo_block_timer.png"),
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	sounds = { dig = { name="", gain = 0 } },
@@ -92,6 +96,7 @@ minetest.register_node("pseudonodes:replacable_pseudo_block_timer", {
 	},
 	inventory_image = minetest.inventorycube("pseudonodes_replacable_pseudo_block_timer.png"),
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	sounds = { dig = { name="", gain = 0 } },
@@ -119,6 +124,7 @@ minetest.register_node("pseudonodes:switch_block_off", {
 	walkable = false,
 	sounds = { dig = { name="", gain = 0 } },
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	alpha = 0,
 	stack_max = 9999,
 	drop = "",
@@ -136,6 +142,7 @@ minetest.register_node("pseudonodes:switch_block_on", {
 	tiles = { "pseudonodes_switch_block_on.png" },
 	inventory_image = minetest.inventorycube("pseudonodes_switch_block_on.png"),
 	groups = { pseudo = 1 },
+	is_ground_content = false,
 	diggable = true,
 	walkable = true,
 	stack_max = 9999,