1 files changed, 2 insertions, 1 deletions
diff --git a/tests/headers/union_with_anon_struct_bitfield.h b/tests/headers/union_with_anon_struct_bitfield.h
index d39b92d1..5a6fc7bc 100644
--- a/tests/headers/union_with_anon_struct_bitfield.h
+++ b/tests/headers/union_with_anon_struct_bitfield.h
@@ -1,7 +1,8 @@
+// bindgen-flags: -no-unstable-rust
 union foo {
     int a;
     struct {
         int b : 7;
         int c : 25;
     };
-};
-\ No newline at end of file
+};