diff --git a/src/stdio/src/lib.rs b/src/stdio/src/lib.rs
index 8912eccdafee676a7af7d3731ca44a8fd395c209..8f07338b73ac21d6057729e205b83623857361df 100644
--- a/src/stdio/src/lib.rs
+++ b/src/stdio/src/lib.rs
@@ -1,6 +1,7 @@
 //! stdio implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/stdio.h.html
 
 #![no_std]
+// For Vec
 #![feature(alloc)]
 #![feature(const_fn)]