diff --git a/tests/source/unsafe-field.rs b/tests/source/unsafe-field.rs
index 35cf40a22d3..ad5cce99999 100644
--- a/tests/source/unsafe-field.rs
+++ b/tests/source/unsafe-field.rs
@@ -1,3 +1,5 @@
+#![feature(unsafe_fields)]
+
 struct Foo {
     unsafe
     field: (),
diff --git a/tests/target/unsafe-field.rs b/tests/target/unsafe-field.rs
index fc7fd3750c6..77c36523ec4 100644
--- a/tests/target/unsafe-field.rs
+++ b/tests/target/unsafe-field.rs
@@ -1,3 +1,5 @@
+#![feature(unsafe_fields)]
+
 struct Foo {
     unsafe field: (),
 }