diff --git a/packages/mermaid/src/docs/syntax/sequenceDiagram.md b/packages/mermaid/src/docs/syntax/sequenceDiagram.md
index 3f3818589..2b68e5de5 100644
--- a/packages/mermaid/src/docs/syntax/sequenceDiagram.md
+++ b/packages/mermaid/src/docs/syntax/sequenceDiagram.md
@@ -418,7 +418,7 @@ It is possible to get a sequence number attached to each arrow in a sequence dia
 </script>
 ```
 
-It can also be be turned on via the diagram code as in the diagram:
+It can also be turned on via the diagram code as in the diagram:
 
 ```mermaid-example
 sequenceDiagram