diff --git a/mod.conf b/mod.conf
index cab78e8..51e0f95 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,5 +1,5 @@
 name = pipeworks
 description = This mod uses mesh nodes and nodeboxes to supply a complete set of 3D pipes and tubes, along with devices that work with them.
 depends = basic_materials
-optional_depends = mesecons, mesecons_mvps, digilines, signs_lib, unified_inventory, default, screwdriver, fl_mapgen, sound_api, i3, hades_core, hades_furnaces, hades_chests
+optional_depends = mesecons, mesecons_mvps, digilines, signs_lib, unified_inventory, default, screwdriver, fl_mapgen, sound_api, i3, hades_core, hades_furnaces, hades_chests, mcl_mapgen_core
 min_minetest_version = 5.4.0
diff --git a/signal_tubes.lua b/signal_tubes.lua
index 2713507..3a47e8c 100644
--- a/signal_tubes.lua
+++ b/signal_tubes.lua
@@ -12,7 +12,7 @@ local function after_break(pos)
 end
 
 if minetest.get_modpath("mesecons") and pipeworks.enable_detector_tube then
-	local detector_tube_step = 5 * tonumber(minetest.settings:get("dedicated_server_step"))
+	local detector_tube_step = 5 * (tonumber(minetest.settings:get("dedicated_server_step")) or 0.09)
 	pipeworks.register_tube("pipeworks:detector_tube_on", {
 			description = S("Detecting Pneumatic Tube Segment on"),
 			inventory_image = "pipeworks_detector_tube_inv.png",