diff --git a/transmission.lua b/transmission.lua
index f05fb57..40fd9e1 100644
--- a/transmission.lua
+++ b/transmission.lua
@@ -90,7 +90,7 @@ end
 rawset(_G, "lb_transmitter", Transmitter)
 
 addHook("ThinkFrame", function()
-	if not #transmitters then return end
+	if not (#transmitters and leveltime) then return end
 
 	local index = (leveltime % #transmitters) + 1
 	local transmitter = transmitters[index]