diff --git a/mods/lzr_laser/blocks.lua b/mods/lzr_laser/blocks.lua
index db3b8bd..0764141 100644
--- a/mods/lzr_laser/blocks.lua
+++ b/mods/lzr_laser/blocks.lua
@@ -193,6 +193,12 @@ local register_element = function(subname, def, options)
 	end
 end
 
+-- Mirror nodebox
+local wedge_box = {}
+for i=-8, 7 do
+	table.insert(wedge_box, { i/16, -0.5, i/16, (i+1)/16, 0.5, 0.5 })
+end
+
 register_element("mirror", {
 	description = S("Mirror"),
 	paramtype = "light",
@@ -231,6 +237,11 @@ register_element("mirror", {
 	},
 
 	light_source_on = 3,
+
+	collision_box = {
+		type = "fixed",
+		fixed = wedge_box,
+	},
 	groups = { rotatable = 1, laser_block = 1 },
 	sounds = lzr_sounds.node_sound_glass_defaults({
 		_rotate = {name = "lzr_laser_mirror_rotate", gain = 1.0},
@@ -274,6 +285,10 @@ register_element("transmissive_mirror", {
 		"lzr_laser_transmissive_mirror_on_hole.png^lzr_laser_fixed.png",
 	},
 	light_source_on = 3,
+	collision_box = {
+		type = "fixed",
+		fixed = wedge_box,
+	},
 	groups = { rotatable = 1, laser_block = 1 },
 	sounds = lzr_sounds.node_sound_glass_defaults({
 		_rotate = {name = "lzr_laser_mirror_rotate", gain = 1.0},