Index: msmtp-1.4.20/src/tls.c
===================================================================
--- msmtp-1.4.20.orig/src/tls.c
+++ msmtp-1.4.20/src/tls.c
@@ -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? */
@@ -988,7 +988,7 @@ int tls_check_cert(tls_t *tls, const cha
     /* Try the DNS subjectAltNames. */
     match_found = 0;
     if ((subj_alt_names =
-                X509_get_ext_d2i(x509cert, NID_subject_alt_name, NULL, NULL)))
+                (STACK_OF(GENERAL_NAME)*)X509_get_ext_d2i(x509cert, NID_subject_alt_name, NULL, NULL)))
     {
         subj_alt_names_count = sk_GENERAL_NAME_num(subj_alt_names);
         for (i = 0; i < subj_alt_names_count; i++)