diff -up openslp-2.0.0/common/slp_crypto.c.orig openslp-2.0.0/common/slp_crypto.c
--- openslp-2.0.0/common/slp_crypto.c.orig	2012-12-07 21:13:28.000000000 +0100
+++ openslp-2.0.0/common/slp_crypto.c	2017-10-04 09:38:48.469999889 +0200
@@ -88,11 +88,24 @@ SLPCryptoDSAKey * SLPCryptoDSAKeyDup(SLP
    result =  DSA_new();
    if (result)
    {
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+      const BIGNUM *p, *q, *g;
+      const BIGNUM *priv_key, *pub_key;
+
+      DSA_get0_pqg(dsa, &p, &q, &g);
+      DSA_get0_key(dsa, &pub_key, &priv_key);
+
+      /* would be nice to check return values, but
+       * original code for OpenSSL < 1.1 didn't do that either... */
+      DSA_set0_pqg(result, BN_dup(p), BN_dup(q), BN_dup(g));
+      DSA_set0_key(result, BN_dup(pub_key), BN_dup(priv_key));
+#else
       result->p = BN_dup(dsa->p);
       result->q = BN_dup(dsa->q);
       result->g = BN_dup(dsa->g);
       result->priv_key = BN_dup(dsa->priv_key);
       result->pub_key = BN_dup(dsa->pub_key);
+#endif
    }
    return result;
 }