diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -169,6 +169,10 @@
 #    define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
 #  endif
 
+#  if defined(_AIX)
+#    define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+#  endif
+
 #  define _LIBCPP_TOSTRING2(x) #x
 #  define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
 
diff --git a/libcxx/test/libcxx/vendor/ibm/bad_function_call.pass.cpp b/libcxx/test/libcxx/vendor/ibm/bad_function_call.pass.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/ibm/bad_function_call.pass.cpp
@@ -0,0 +1,19 @@
+//===-- libc++ export redefined symbols test ------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: powerpc-ibm-aix7.3.0.0
+// REQUIRES: powerpc64-ibm-aix7.3.0.0
+
+#include <functional>
+
+void foo() {}
+
+int main() {
+  std::function<void()> r(foo);
+  r();
+}