diff --git a/interface/fs.if b/interface/fs.if
index 0d8e635..1e01493 100644
--- a/interface/fs.if
+++ b/interface/fs.if
@@ -1,4 +1,3 @@
 interface fs {
 	msg open(string path, int flags) -> (int err);
-	msg uppercase(string old) -> (string new);
 }