diff --git a/src/lib/macos_os.rs b/src/lib/macos_os.rs
index a484f72b373..fff528975c0 100644
--- a/src/lib/macos_os.rs
+++ b/src/lib/macos_os.rs
@@ -1,4 +1,5 @@
-import libc = posix;
+import _str.sbuf;
+import _vec.vbuf;
 
 native mod libc = "libc.dylib" {