diff --git a/src/markdownrenderer.tsx b/src/markdownrenderer.tsx
index 70182869..285fc91d 100644
--- a/src/markdownrenderer.tsx
+++ b/src/markdownrenderer.tsx
@@ -7,6 +7,7 @@ import {WindowSize, RendererContext, TermOptsType, LineType, RendererOpts} from
 import ReactMarkdown from 'react-markdown'
 import remarkGfm from 'remark-gfm'
 import {boundInt} from "./util";
+import {sprintf} from "sprintf-js";
 
 type OV<V> = mobx.IObservableValue<V>;