diff --git a/include/curl/curlbuild.h.dist b/include/curl/curlbuild.h.dist
index 5737cc08d..3ad2f018d 100644
--- a/include/curl/curlbuild.h.dist
+++ b/include/curl/curlbuild.h.dist
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -527,7 +527,8 @@
 /* ===================================== */
 
 #elif defined(__GNUC__)
-#  if defined(__i386__) || defined(__ppc__) || defined(__arm__)
+#  if defined(__ILP32__) || \
+      defined(__i386__) || defined(__ppc__) || defined(__arm__)
 #    define CURL_SIZEOF_LONG           4
 #    define CURL_TYPEOF_CURL_OFF_T     long long
 #    define CURL_FORMAT_CURL_OFF_T     "lld"
@@ -536,7 +537,8 @@
 #    define CURL_SIZEOF_CURL_OFF_T     8
 #    define CURL_SUFFIX_CURL_OFF_T     LL
 #    define CURL_SUFFIX_CURL_OFF_TU    ULL
-#  elif defined(__x86_64__) || defined(__ppc64__)
+#  elif defined(__LP64__) || \
+        defined(__x86_64__) || defined(__ppc64__)
 #    define CURL_SIZEOF_LONG           8
 #    define CURL_TYPEOF_CURL_OFF_T     long
 #    define CURL_FORMAT_CURL_OFF_T     "ld"