diff --git a/energy_control b/energy_control
index 39d3baa..0985b12 100644
--- a/energy_control
+++ b/energy_control
@@ -33,7 +33,8 @@ function poll()
 end
 
 function recv()
-    local redstone_toggle_state = nil
+    local redstone_toggle_state
+    local de_store_energy_stored, de_store_max_energy_stored, de_store_transfer_per_tick
     local updated = false
     while true do
         local id, data = rednet.receive()