diff --git a/action.yml b/action.yml
index d719d21..64fdfad 100644
--- a/action.yml
+++ b/action.yml
@@ -88,7 +88,7 @@ inputs:
     description: "use buildx instead of legacy build"
     default: "true"
 
-  docker_multi_arch:
+  docker_multiarch:
     description: ""
     default: "false"