--- /dev/null
+From 9e28eac720176ecb9b784510d352aa0ac38d0b56 Mon Sep 17 00:00:00 2001
+From: Jack Lloyd <jack@randombit.net>
+Date: Wed, 4 Oct 2017 13:59:21 -0400
+Subject: [PATCH] Add limits.h header for INT_MAX
+
+Gentoo bug https://bugs.gentoo.org/633468
+---
+ src/lib/prov/openssl/openssl_mode.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/lib/prov/openssl/openssl_mode.cpp b/src/lib/prov/openssl/openssl_mode.cpp
+index 9580bc9c5..fabaccb18 100644
+--- a/src/lib/prov/openssl/openssl_mode.cpp
++++ b/src/lib/prov/openssl/openssl_mode.cpp
+@@ -10,6 +10,7 @@
+ #include <botan/internal/rounding.h>
+ #include <botan/internal/openssl.h>
+ #include <openssl/evp.h>
++#include <limits.h>
+
+ namespace Botan {
+