diff --git a/types/react-input-autosize/index.d.ts b/types/react-input-autosize/index.d.ts
index 41782e482a..486fef4491 100644
--- a/types/react-input-autosize/index.d.ts
+++ b/types/react-input-autosize/index.d.ts
@@ -9,7 +9,7 @@ import * as React from 'react';
 
 export interface AutosizeInputProps extends React.InputHTMLAttributes<HTMLInputElement>, React.ClassAttributes<HTMLInputElement> {
     inputClassName?: string;
-    inputRef?: React.Ref<HTMLInputElement>;
+    inputRef?: (instance: HTMLInputElement | null) => void;
     inputStyle?: React.CSSProperties;
     minWidth?: string | number;
     onAutosize?: (inputWidth: string | number) => void;
diff --git a/types/react-input-autosize/react-input-autosize-tests.tsx b/types/react-input-autosize/react-input-autosize-tests.tsx
index d67da978cf..204922a8de 100644
--- a/types/react-input-autosize/react-input-autosize-tests.tsx
+++ b/types/react-input-autosize/react-input-autosize-tests.tsx
@@ -2,10 +2,10 @@ import * as React from 'react';
 import AutosizeInput, { AutosizeInputProps } from 'react-input-autosize';
 
 class Test extends React.Component<AutosizeInputProps> {
-    input: HTMLInputElement;
+    input: HTMLInputElement | null = null;
     auto: AutosizeInput;
 
-    inputRef = (ref: HTMLInputElement) => {
+    inputRef = (ref: HTMLInputElement | null) => {
         this.input = ref;
     }