diff --git a/src/TextField/TextFieldUnderline.jsx b/src/TextField/TextFieldUnderline.jsx
index 087f56f4302aa9..4c6ebeae2ded74 100644
--- a/src/TextField/TextFieldUnderline.jsx
+++ b/src/TextField/TextFieldUnderline.jsx
@@ -4,42 +4,42 @@ import Styles from '../utils/styles';
 
 const propTypes = {
   /**
-   * True if the parent TextField is disabled
+   * True if the parent `TextField` is disabled.
    */
   disabled: React.PropTypes.bool,
 
   /**
-   * Override the inline-styles of the underline when parent TextField is disabled
+   * Override the inline-styles of the underline when parent `TextField` is disabled.
    */
   disabledStyle: React.PropTypes.object,
 
   /**
-   * True if the parent TextField has an error
+   * True if the parent `TextField` has an error.
    */
   error: React.PropTypes.bool,
 
   /**
-   * Override the inline-styles of the underline when parent TextField has an error
+   * Override the inline-styles of the underline when parent `TextField` has an error.
    */
   errorStyle: React.PropTypes.object,
 
   /**
-   * True if the parent TextField is focused
+   * True if the parent `TextField` is focused.
    */
   focus: React.PropTypes.bool,
 
   /**
-   * Override the inline-styles of the underline when parent TextField is focused
+   * Override the inline-styles of the underline when parent `TextField` is focused.
    */
   focusStyle: React.PropTypes.object,
 
   /**
-   * The material-ui theme applied to this component
+   * The material-ui theme applied to this component.
    */
   muiTheme: React.PropTypes.object.isRequired,
 
   /**
-   * Override the inline-styles of the underline
+   * Override the inline-styles of the underline.
    */
   style: React.PropTypes.object,
 };