diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index 87598366d7..8d04162414 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -5422,6 +5422,8 @@ static int ssl_tls13_handle_hs_message_post_handshake(mbedtls_ssl_context *ssl)
 #endif
         }
     }
+#else
+    (void) ssl;
 #endif /* MBEDTLS_SSL_CLI_C */
 
     /* Fail in all other cases. */