diff --git a/cf/broken-getnameinfo.m4 b/cf/broken-getnameinfo.m4
new file mode 100644
index 000000000..82dcca927
--- /dev/null
+++ b/cf/broken-getnameinfo.m4
@@ -0,0 +1,28 @@
+dnl $Id$
+dnl
+dnl test for broken AIX getnameinfo
+
+AC_DEFUN(rk_BROKEN_GETNAMEINFO,
+AC_CACHE_CHECK([for broken getnameinfo], ac_cv_func_getnameinfo_broken,
+AC_TRY_RUN([#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+
+int
+main(int argc, char **argv)
+{
+  struct sockaddr_in sin;
+  char host[256];
+  memset(&sin, 0, sizeof(sin));
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+  sin.sin_len = sizeof(sin);
+#endif
+  sin.sin_family = AF_INET;
+  sin.sin_addr.s_addr = 0xffffffff;
+  sin.sin_port = 0;
+  return getnameinfo((struct sockaddr*)&sin, sizeof(sin), host, sizeof(host),
+	      NULL, 0, 0);
+}
+], ac_cv_func_getnameinfo_broken=no, ac_cv_sys_func_getnameinfo_broken=yes))