diff --git a/src/test/run-pass/struct-destructuring-cross-crate.rs b/src/test/run-pass/struct-destructuring-cross-crate.rs
index aefebb1395a..5a8c75abb88 100644
--- a/src/test/run-pass/struct-destructuring-cross-crate.rs
+++ b/src/test/run-pass/struct-destructuring-cross-crate.rs
@@ -1,4 +1,6 @@
 // xfail-fast
+// aux-build:struct_destructuring_cross_crate.rs
+
 extern mod struct_destructuring_cross_crate;
 
 fn main() {