diff --git a/beacon.lua b/beacon.lua
index 9d0d3bf..993c47e 100644
--- a/beacon.lua
+++ b/beacon.lua
@@ -32,6 +32,7 @@ minetest.register_node("locator:beacon_base", {
 		"locator_beacon_base.png",
 	},
 	groups = {cracky=3,oddly_breakable_by_hand=3},
+	is_ground_content = false,
 	sounds = default.node_sound_glass_defaults()
 })
 
@@ -58,6 +59,7 @@ local register_beacon = function(level, range, ingredient)
 			"locator_beacon_level" .. level .. ".png"
 		},
 		groups = {cracky=3,oddly_breakable_by_hand=3},
+		is_ground_content = false,
 		sounds = default.node_sound_glass_defaults(),
 
 		after_place_node = function(pos, placer)
diff --git a/radar.lua b/radar.lua
index d7a6771..452c0c9 100644
--- a/radar.lua
+++ b/radar.lua
@@ -80,6 +80,7 @@ minetest.register_node("locator:radar", {
 		"locator_radar.png"
 	},
 	groups = {cracky=3,oddly_breakable_by_hand=3},
+	is_ground_content = false,
 	sounds = default.node_sound_glass_defaults(),
 
 	on_receive_fields = function(pos, formname, fields, sender)