diff --git a/docs/metadata.md b/docs/metadata.md
index 880ebbf20..d3efcea41 100644
--- a/docs/metadata.md
+++ b/docs/metadata.md
@@ -65,7 +65,7 @@ needed.
 
 # Metadata image creation
 
-Run `linuxkit run` backends accept a `--data=STRING` option which will
+Run `linuxkit run` backends accept a `-data=STRING` option which will
 cause the given string to be passed to the VM in a platform specific
 manner to be picked up by the `pkg/metadata` component.