diff --git a/types/react-image-gallery/index.d.ts b/types/react-image-gallery/index.d.ts
index 5b10b5925b..45de6e4d0a 100644
--- a/types/react-image-gallery/index.d.ts
+++ b/types/react-image-gallery/index.d.ts
@@ -79,7 +79,7 @@ declare class ReactImageGallery extends React.Component<ReactImageGalleryProps>
     fullScreen: () => void;
     exitFullScreen: () => void;
     slideToIndex: (index: number) => void;
-    getCurrentIndex: () => void;
+    getCurrentIndex: () => number;
 }
 
 export default ReactImageGallery;
diff --git a/types/react-image-gallery/react-image-gallery-tests.tsx b/types/react-image-gallery/react-image-gallery-tests.tsx
index 65fedd7828..04e7d6a6f9 100644
--- a/types/react-image-gallery/react-image-gallery-tests.tsx
+++ b/types/react-image-gallery/react-image-gallery-tests.tsx
@@ -2,6 +2,14 @@ import * as React from 'react';
 import ReactImageGallery, { ReactImageGalleryItem, ReactImageGalleryProps } from 'react-image-gallery';
 
 class ImageGallery extends React.Component {
+    private gallery: ReactImageGallery | null;
+
+    componentDidMount() {
+        if (this.gallery) {
+            const message = `Showing ${this.gallery.getCurrentIndex() + 1}. image the gallery.`;
+        }
+    }
+
     render() {
         const galleryItem: ReactImageGalleryItem = {
             original: 'http://localhost/logo.jpg',
@@ -14,6 +22,6 @@ class ImageGallery extends React.Component {
             showFullscreenButton: false
         };
 
-        return <ReactImageGallery {...props} />;
+        return <ReactImageGallery ref={(r) => this.gallery = r} {...props} />;
     }
 }