diff --git a/clang/test/Sema/struct-packed-align.c b/clang/test/Sema/struct-packed-align.c
--- a/clang/test/Sema/struct-packed-align.c
+++ b/clang/test/Sema/struct-packed-align.c
@@ -167,6 +167,9 @@
 // must maintain ABI backwards compatibility.
 extern int o1[sizeof(struct packed_chars) == 3 ? 1 : -1];
 extern int o2[__alignof(struct packed_chars) == 1 ? 1 : -1];
+#elif defined(_AIX)
+extern int o1[sizeof(struct packed_chars) == 4 ? 1 : -1];
+extern int o2[__alignof(struct packed_chars) == 4 ? 1 : -1];
 #else
 extern int o1[sizeof(struct packed_chars) == 2 ? 1 : -1];
 extern int o2[__alignof(struct packed_chars) == 1 ? 1 : -1];