- (dtucker) [configure.ac mac.c openbsd-compat/openssl-compat.h]  Add
   null implementation of HMAC_CTX_init for the benefit of old versions
   of OpenSSL that don't have it.
diff --git a/mac.c b/mac.c
index da7b5d8..332d3c6 100644
--- a/mac.c
+++ b/mac.c
@@ -44,6 +44,8 @@
 
 #include "umac.h"
 
+#include "openbsd-compat/openssl-compat.h"
+
 #define SSH_EVP		1	/* OpenSSL EVP-based MAC */
 #define SSH_UMAC	2	/* UMAC (not integrated with OpenSSL) */