diff --git a/docs/reference/migration/migrate_3_0.asciidoc b/docs/reference/migration/migrate_3_0.asciidoc
index 1c386b2ecfa..0ea68ecacc8 100644
--- a/docs/reference/migration/migrate_3_0.asciidoc
+++ b/docs/reference/migration/migrate_3_0.asciidoc
@@ -166,7 +166,7 @@ with `_parent` field mapping created before version `2.0.0`. The data of these i
 
 The format of the join between parent and child documents have changed with the `2.0.0` release. The old
 format can't read from version `3.0.0` and onwards. The new format allows for a much more efficient and
-scalable join between parent and child documents and the join data structures are stored on on disk
+scalable join between parent and child documents and the join data structures are stored on disk
 data structures as opposed as before the join data structures were stored in the jvm heap space.
 
 ==== `score_type` has been removed