diff --git a/reactor.lua b/reactor.lua
index cfc9746..d4f1e49 100644
--- a/reactor.lua
+++ b/reactor.lua
@@ -1,5 +1,5 @@
 
-os.loadAPI("lib/f.lua")
+os.loadAPI("lib/f")
 os.loadAPI("lib/button")
 
 local targetStrength = 50