diff --git a/test/SemaCXX/builtins-arm.cpp b/test/SemaCXX/builtins-arm.cpp
new file mode 100644
index 0000000..8a0cf81
--- /dev/null
+++ b/test/SemaCXX/builtins-arm.cpp
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -triple armv7 -fsyntax-only -verify %s
+
+// va_list on ARM AAPCS is struct { void* __ap }.
+int test1(const __builtin_va_list &ap) {
+  return __builtin_va_arg(ap, int); // expected-error {{binding of reference to type '__builtin_va_list' to a value of type 'const __builtin_va_list' drops qualifiers}}
+}