diff --git a/README.md b/README.md
index fd8d6bb..e49bbb0 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ The following additional configuration options are available by specifying them
     - It's `true` on `*.tsx` files regardless of this option.
     - Otherwise, it respects this option.
 
-- **`useJSXTextNode`** - default `false`. The JSX AST changed the node type for string literals inside a JSX Element from `Literal` to `JSXText`. When value is `true`, these nodes will be parsed as type `JSXText`. When value is `false`, these nodes will be parsed as type `Literal`.
+- **`useJSXTextNode`** - default `true`. Please set `false` if you use this parser on ESLint v4. If this is `false`, the parser creates the AST of JSX texts as the legacy style.
 
 ### .eslintrc.json
 
diff --git a/parser.js b/parser.js
index 10d3063..693992e 100644
--- a/parser.js
+++ b/parser.js
@@ -20,7 +20,12 @@ const visitorKeys = require("./visitor-keys");
 exports.version = require("./package.json").version;
 
 exports.parseForESLint = function parseForESLint(code, options) {
-    if (options && typeof options.filePath === "string") {
+    if (typeof options !== "object" || options === null) {
+        options = { useJSXTextNode: true };
+    } else if (typeof options.useJSXTextNode !== "boolean") {
+        options = Object.assign({}, options, { useJSXTextNode: true });
+    }
+    if (typeof options.filePath === "string") {
         const tsx = options.filePath.endsWith(".tsx");
         if (tsx || options.filePath.endsWith(".ts")) {
             options = Object.assign({}, options, { jsx: tsx });
diff --git a/tests/lib/__snapshots__/comments.js.snap b/tests/lib/__snapshots__/comments.js.snap
index 41309c3..5672625 100644
--- a/tests/lib/__snapshots__/comments.js.snap
+++ b/tests/lib/__snapshots__/comments.js.snap
@@ -1219,7 +1219,7 @@ Object {
                         ],
                         "raw": "
             ",
-                        "type": "Literal",
+                        "type": "JSXText",
                         "value": "
             ",
                       },
@@ -1274,7 +1274,7 @@ Object {
                         ],
                         "raw": "
         ",
-                        "type": "Literal",
+                        "type": "JSXText",
                         "value": "
         ",
                       },
@@ -1960,7 +1960,7 @@ Object {
                         ],
                         "raw": "
         ",
-                        "type": "Literal",
+                        "type": "JSXText",
                         "value": "
         ",
                       },