diff --git a/include/haproxy/openssl-compat.h b/include/haproxy/openssl-compat.h
index f52079034..afb29d378 100644
--- a/include/haproxy/openssl-compat.h
+++ b/include/haproxy/openssl-compat.h
@@ -325,6 +325,13 @@ static inline X509 *X509_STORE_CTX_get0_cert(X509_STORE_CTX *ctx)
 {
     return ctx->cert;
 }
+
+/* note: no error checking, simplified version only */
+static inline void ECDSA_SIG_set0(ECDSA_SIG *ecdsa_sig, BIGNUM *ec_R, BIGNUM *ec_S)
+{
+	ecdsa_sig->r = ec_R;
+	ecdsa_sig->s = ec_S;
+}
 #endif
 
 #if (HA_OPENSSL_VERSION_NUMBER < 0x3000000fL)