diff -Nur nss-3.27.1.orig/nss/lib/freebl/unix_rand.c nss-3.27.1/nss/lib/freebl/unix_rand.c
--- nss-3.27.1.orig/nss/lib/freebl/unix_rand.c	2016-10-03 16:55:58 +0200
+++ nss-3.27.1/nss/lib/freebl/unix_rand.c	2016-10-18 10:43:53 +0200
@@ -1070,7 +1070,7 @@
     struct dirent *entry;
 #if defined(__sun)
     char firstName[256];
-#else
+#elif !defined(_AIX)
     char firstName[NAME_MAX + 1];
 #endif
     const char *name = NULL;
@@ -1085,6 +1085,10 @@
     if (fd == NULL) {
         return 1;
     }
+#if defined(_AIX)
+    long nameMax = fpathconf(fd, _PC_NAME_MAX);
+    char firstName[nameMax];
+#endif
 
     firstName[0] = '\0';
     for (i = 0; i <= fileToRead; i++) {