1 files changed, 4 insertions, 3 deletions
diff --git a/doc/designs/ddd/ddd-06-mem-uv.c b/doc/designs/ddd/ddd-06-mem-uv.c
index f912f68bdf..7af5a11105 100644
--- a/doc/designs/ddd/ddd-06-mem-uv.c
+++ b/doc/designs/ddd/ddd-06-mem-uv.c
@@ -237,11 +237,12 @@ static void on_rx_push(APP_CONN *conn)
 
         srd = SSL_read(conn->ssl, buf, buf_len);
         flush_write_buf(conn);
-        if (srd < 0) {
-            free(buf);
+        if (srd <= 0) {
             rc = SSL_get_error(conn->ssl, srd);
-            if (rc == SSL_ERROR_WANT_READ)
+            if (rc == SSL_ERROR_WANT_READ) {
+                free(buf);
                 return;
+            }
         }
 
         conn->app_read_cb(conn, buf, srd, conn->app_read_arg);