diff --git a/mods/ITEMS/REDSTONE/mesecons_pressureplates/init.lua b/mods/ITEMS/REDSTONE/mesecons_pressureplates/init.lua
index 9ec2ffe94..e323fc9d4 100644
--- a/mods/ITEMS/REDSTONE/mesecons_pressureplates/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_pressureplates/init.lua
@@ -67,6 +67,7 @@ function mesecon:register_pressure_plate(offstate, onstate, description, texture
 		wield_image = texture_off,
 		wield_scale = { x=1, y=1, z=0.5 },
 		paramtype = "light",
+		sunlight_propagates = true,
 		selection_box = pp_box_off,
 		node_box = pp_box_off,
 		groups = groups_off,
@@ -95,6 +96,7 @@ function mesecon:register_pressure_plate(offstate, onstate, description, texture
 		wield_image = texture_on,
 		wield_scale = { x=1, y=1, z=0.25 },
 		paramtype = "light",
+		sunlight_propagates = true,
 		selection_box = pp_box_on,
 		node_box = pp_box_on,
 		groups = groups_on,