diff --git a/src/react/LogMonitor.js b/src/react/LogMonitor.js
index d960f460..c9839de5 100644
--- a/src/react/LogMonitor.js
+++ b/src/react/LogMonitor.js
@@ -54,7 +54,11 @@ export default class LogMonitor extends Component {
     jumpToState: PropTypes.func.isRequired,
     setMonitorState: PropTypes.func.isRequired,
     select: PropTypes.func.isRequired,
-    visibleOnLoad: PropTypes.bool
+    visibleOnLoad: PropTypes.bool,
+    theme: PropTypes.oneOfType([
+      PropTypes.object,
+      PropTypes.string
+    ])
   };
 
   static defaultProps = {