--- configure.ac.orig	2018-10-08 21:17:06 UTC
+++ configure.ac
@@ -137,14 +137,15 @@ AC_SEARCH_LIBS([shutdown], [socket])
 
 # Conditional build with OpenSSL
 if test "$openssl" = 'yes'; then
-    AC_CHECK_HEADERS([openssl/md5.h],,[AC_MSG_ERROR([<openssl/md5.h> header missing])])
+# Conditional build with OpenSSL
+if test "$openssl" = 'yes'; then
     AC_CHECK_HEADERS([openssl/bio.h],,[AC_MSG_ERROR([<openssl/bio.h> header missing])])
     AC_CHECK_HEADERS([openssl/err.h],,[AC_MSG_ERROR([<openssl/err.h> header missing])])
     AC_CHECK_HEADERS([openssl/rand.h],,[AC_MSG_ERROR([<openssl/rand.h> header missing])])
     AC_CHECK_HEADERS([openssl/ssl.h],,[AC_MSG_ERROR([<openssl/ssl.h> header missing])])
     AC_CHECK_HEADERS([openssl/x509v3.h],,[AC_MSG_ERROR([<openssl/x509v3.h> header missing])])
-    AC_CHECK_LIB([ssl], [SSL_library_init],,[AC_MSG_ERROR([ssl library missing])])
-    AC_CHECK_LIB([crypto], [CRYPTO_num_locks],,[AC_MSG_ERROR([crypto library missing])])
+    AC_CHECK_LIB([ssl], [SSL_CTX_new],,[AC_MSG_ERROR([ssl library missing])])
+    AC_CHECK_LIB([crypto], [CRYPTO_free],,[AC_MSG_ERROR([crypto library missing])])
 fi
 # For Makefile.am
 AM_CONDITIONAL(HAVE_OPENSSL, test "$openssl" = "yes")
@@ -156,6 +157,7 @@ if test "$sctp" = 'yes'; then
     AC_SEARCH_LIBS([sctp_freepaddrs],[sctp sctpsp],,[AC_MSG_ERROR([SCTP library missing])])
     AC_SEARCH_LIBS([sctp_bindx],[sctp sctpsp],,[AC_MSG_ERROR([SCTP library missing])])
     AC_SEARCH_LIBS([sctp_recvmsg],[sctp sctpsp],,[AC_MSG_ERROR([SCTP library missing])])
+fi
 fi
 # For Makefile.am
 AM_CONDITIONAL(HAVE_SCTP, test "$sctp" = "yes")