diff --git a/python_on_whales/components/buildx/cli_wrapper.py b/python_on_whales/components/buildx/cli_wrapper.py
index 3877407c..fef170a5 100644
--- a/python_on_whales/components/buildx/cli_wrapper.py
+++ b/python_on_whales/components/buildx/cli_wrapper.py
@@ -367,7 +367,8 @@ def build(
             full_cmd.add_simple_arg("--cache-to", format_dict_for_buildx(cache_to))
         else:
             full_cmd.add_simple_arg("--cache-to", cache_to)
-        full_cmd.add_args_iterable_or_single("--secret", to_list(secrets))
+        if secrets:
+            full_cmd.add_args_iterable_or_single("--secret", to_list(secrets))
         if output != {}:
             full_cmd += ["--output", format_dict_for_buildx(output)]
         if platforms is not None: