diff --git a/README.md b/README.md
index 61c250f5..3b173ee7 100644
--- a/README.md
+++ b/README.md
@@ -277,7 +277,7 @@ The `registry` exporter is a shortcut for `type=image,push=true`.
 
 #### `--push`
 
-Shorthand for [`--output=type=registry`](#registry). Will automatically push the build result to registry.
+Shorthand for [`--output=type=registry`](#registry). Will automatically push the build result to registry. To use this option, you need to create the builder by `docker buildx create` command.
 
 #### `--load`