diff -p -up msmtp-1.4.20/src/tls.c.stack msmtp-1.4.20/src/tls.c
--- msmtp-1.4.20/src/tls.c.stack	2010-02-06 15:24:02.000000000 -0200
+++ msmtp-1.4.20/src/tls.c	2010-04-05 16:48:32.000000000 -0300
@@ -888,7 +888,7 @@ int tls_check_cert(tls_t *tls, const cha
     char *buf;
     int length;
     /* needed to get the DNS subjectAltNames: */
-    STACK *subj_alt_names;
+    STACK_OF(GENERAL_NAME) *subj_alt_names;
     int subj_alt_names_count;
     GENERAL_NAME *subj_alt_name;
     /* did we find a name matching hostname? */