--- mod_auth_cas-1.0.9.1/configure.ac.openssl11	2011-11-09 19:19:36.000000000 +0100
+++ mod_auth_cas-1.0.9.1/configure.ac	2017-09-09 12:18:12.367356785 +0200
@@ -55,7 +55,7 @@
 )
 
 AC_CHECK_LIB([crypto],[CRYPTO_new_ex_data], [], [AC_MSG_ERROR([OpenSSL libraries required])])
-AC_CHECK_LIB([ssl],[SSL_library_init], [], [AC_MSG_ERROR([OpenSSL libraries required])])
+AC_CHECK_LIB([ssl],[SSL_new], [], [AC_MSG_ERROR([OpenSSL libraries required])])
 
 AC_CHECK_HEADERS([openssl/crypto.h openssl/x509.h openssl/pem.h openssl/ssl.h openssl/err.h],[],[AC_MSG_ERROR([OpenSSL headers required])])