diff --git a/src/mermaidAPI.ts b/src/mermaidAPI.ts
index 303a78680..70e3b679b 100644
--- a/src/mermaidAPI.ts
+++ b/src/mermaidAPI.ts
@@ -8,7 +8,7 @@
  * The core of this api is the [**render**](Setup.md?id=render) function which, given a graph
  * definition as text, renders the graph/diagram and returns an svg element for the graph.
  *
- * It is is then up to the user of the API to make use of the svg, either insert it somewhere in the
+ * It is then up to the user of the API to make use of the svg, either insert it somewhere in the
  * page or do something completely different.
  *
  * In addition to the render function, a number of behavioral configuration options are available.