diff --git a/Tools/nib2cib/main.j b/Tools/nib2cib/main.j
index e00eae9ae..b5296c7b8 100644
--- a/Tools/nib2cib/main.j
+++ b/Tools/nib2cib/main.j
@@ -22,7 +22,7 @@
 
 @import "Nib2Cib.j"
 
-var OS = require("OS"),
+var OS = require("os"),
     stream = require("narwhal/term").stream;