diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 82e6525..c64036c 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1333,7 +1333,8 @@
         *(p++) = (unsigned char)( zlen      );
         p += zlen;
 
-        MBEDTLS_SSL_DEBUG_MPI( 3, "ECDH: z", &ssl->handshake->ecdh_ctx.z );
+        MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
+                                MBEDTLS_DEBUG_ECDH_Z );
     }
     else
 #endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */