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.cpp b/libcxx/test/libcxx/vendor/ibm/bad_function_call.cpp
new file mode 100644
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/ibm/bad_function_call.cpp
@@ -0,0 +1,8 @@
+#include <functional>
+
+void foo() {}
+
+int main() {
+  std::function<void()> r(foo);
+  r();
+}