diff --git a/reactor.lua b/reactor.lua
index d0713ec..7b8e32a 100644
--- a/reactor.lua
+++ b/reactor.lua
@@ -168,7 +168,7 @@ if fs.exists("reactorconfig.txt") then
 	load_config()
 end
 
-if not targetOutput then
+if not targetOutput or targetOutput == 0 then
 	targetOutput = fluxgate.getSignalLowFlow()
 end