diff --git a/crypto/fipsmodule/ecdh/ecdh.c b/crypto/fipsmodule/ecdh/ecdh.c
index a7b2f08..4e6d0bf 100644
--- a/crypto/fipsmodule/ecdh/ecdh.c
+++ b/crypto/fipsmodule/ecdh/ecdh.c
@@ -94,8 +94,8 @@
   uint8_t buf[EC_MAX_BYTES];
   size_t buflen;
   if (!ec_point_mul_scalar(group, &shared_point, &pub_key->raw, priv) ||
-      !ec_point_get_affine_coordinate_bytes(group, buf, NULL, &buflen,
-                                            sizeof(buf), &shared_point)) {
+      !ec_get_x_coordinate_as_bytes(group, buf, &buflen, sizeof(buf),
+                                    &shared_point)) {
     OPENSSL_PUT_ERROR(ECDH, ECDH_R_POINT_ARITHMETIC_FAILURE);
     return 0;
   }