diff --git a/include/haproxy/openssl-compat.h b/include/haproxy/openssl-compat.h
index 96a0bf38b..8e1b94bc3 100644
--- a/include/haproxy/openssl-compat.h
+++ b/include/haproxy/openssl-compat.h
@@ -261,6 +261,31 @@ static inline void SSL_CTX_up_ref(SSL_CTX *ctx)
 {
     CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
 }
+
+static inline int X509_CRL_get_signature_nid(const X509_CRL *crl)
+{
+	return OBJ_obj2nid(crl->sig_alg->algorithm);
+}
+
+static inline const ASN1_TIME *X509_CRL_get0_lastUpdate(const X509_CRL *crl)
+{
+	return X509_CRL_get_lastUpdate(crl);
+}
+
+static inline const ASN1_TIME *X509_CRL_get0_nextUpdate(const X509_CRL *crl)
+{
+	return X509_CRL_get_nextUpdate(crl);
+}
+
+static inline const ASN1_INTEGER *X509_REVOKED_get0_serialNumber(const X509_REVOKED *x)
+{
+    return x->serialNumber;
+}
+
+static inline const ASN1_TIME *X509_REVOKED_get0_revocationDate(const X509_REVOKED *x)
+{
+    return x->revocationDate;
+}
 #endif
 
 #if (HA_OPENSSL_VERSION_NUMBER >= 0x1010000fL) || (LIBRESSL_VERSION_NUMBER >= 0x2070200fL)
diff --git a/src/ssl_ckch.c b/src/ssl_ckch.c
index bbd83aae7..f59c212f8 100644
--- a/src/ssl_ckch.c
+++ b/src/ssl_ckch.c
@@ -3327,7 +3327,7 @@ static int show_crl_detail(X509_CRL *crl, struct buffer *out)
 		if (BIO_reset(bio) == -1)
 			goto end;
 		BIO_printf(bio , "    Serial Number: ");
-		i2a_ASN1_INTEGER(bio, X509_REVOKED_get0_serialNumber(rev_entry));
+		i2a_ASN1_INTEGER(bio, (ASN1_INTEGER*)X509_REVOKED_get0_serialNumber(rev_entry));
 		BIO_printf(bio, "\n        Revocation Date: ");
 		ASN1_TIME_print(bio, X509_REVOKED_get0_revocationDate(rev_entry));
 		BIO_printf(bio, "\n");