diff --git a/base.rs b/base.rs
index fde4100..107158a 100644
--- a/base.rs
+++ b/base.rs
@@ -45,7 +45,7 @@ pub fn test_nsapp() {
 
     let nsapp = objc::objc_msgSend(klass, sel);
 
-    io::println(#fmt("nsapp: %d", (nsapp as int)));
+    io::println(fmt!("nsapp: %d", (nsapp as int)));
 }
 
 #[test]