diff --git a/src/components/Input.react.js b/src/components/Input.react.js
index ff10a8c2a..4a7412c60 100644
--- a/src/components/Input.react.js
+++ b/src/components/Input.react.js
@@ -234,7 +234,7 @@ Input.propTypes = {
     /**
      * This attribute indicates that the user cannot modify the value of the control. The value of the attribute is irrelevant. If you need read-write access to the input value, do not add the "readonly" attribute. It is ignored if the value of the type attribute is hidden, range, color, checkbox, radio, file, or a button type (such as button or submit).
      */
-    readonly: PropTypes.string,
+    readOnly: PropTypes.string,
 
     /**
      * This attribute specifies that the user must fill in a value before submitting a form. It cannot be used when the type attribute is hidden, image, or a button type (submit, reset, or button). The :optional and :required CSS pseudo-classes will be applied to the field as appropriate.