diff --git a/farm_control.lua b/farm_control.lua
index 01613e0..ae9abb8 100644
--- a/farm_control.lua
+++ b/farm_control.lua
@@ -62,7 +62,7 @@ function send_machine (relay_and_side)
     local RELAY_COMMAND = "setOutput"
     local relay, side = relay_and_side:match"(.+):(.+)"
     peripheral.call(relay, RELAY_COMMAND, side, true)
-    os.sleep(HARVESTER_SIGNAL_TIME)
+    os.sleep(SIGNAL_TIME)
     peripheral.call(relay, RELAY_COMMAND, side, false)
 end