diff --git a/index.d.ts b/index.d.ts
index f37b1df..66ef62f 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1,12 +1,65 @@
-import { Parser } from 'acorn' 
+import * as acorn from 'acorn';
 
-declare const jsx: (options?: jsx.Options) => (BaseParser: typeof Parser) => typeof Parser;
+interface JsxTokTypes extends AcornTokTypes {
+  jsxName: acorn.TokenType,
+  jsxText: acorn.TokenType,
+  jsxTagEnd: acorn.TokenType,
+  jsxTagStart: acorn.TokenType
+}
+
+declare const jsx: {
+  tokTypes: JsxTokTypes;
+  (options?: jsx.Options): (BaseParser: typeof acorn.Parser) => jsx.AcornJsxParserCtor
+}
+
+type AcornTokTypes = typeof acorn.tokTypes;
 
 declare namespace jsx {
+
+  type TokTypes = JsxTokTypes
+
   interface Options {
     allowNamespacedObjects?: boolean;
     allowNamespaces?: boolean;
   }
+
+  interface TokContexts {
+    tc_oTag: acorn.TokContext,
+    tc_cTag: acorn.TokContext,
+    tc_expr: acorn.TokContext
+  }
+
+  // We pick (statics) from acorn rather than plain extending to avoid complaint
+  //   about base constructors needing the same return type (i.e., we return
+  //   `AcornJsxParser` here)
+  interface AcornJsxParserCtor extends Pick<typeof acorn.Parser, keyof typeof acorn.Parser> {
+    readonly acornJsx: {
+      tokTypes: TokTypes;
+      tokContexts: TokContexts
+    };
+
+    new (options: acorn.Options, input: string, startPos?: number): AcornJsxParser;
+  }
+
+  interface AcornJsxParser extends acorn.Parser {
+    jsx_readToken(): string;
+    jsx_readNewLine(normalizeCRLF: boolean): void;
+    jsx_readString(quote: number): void;
+    jsx_readEntity(): string;
+    jsx_readWord(): void;
+    jsx_parseIdentifier(): acorn.Node;
+    jsx_parseNamespacedName(): acorn.Node;
+    jsx_parseElementName(): acorn.Node | string;
+    jsx_parseAttributeValue(): acorn.Node;
+    jsx_parseEmptyExpression(): acorn.Node;
+    jsx_parseExpressionContainer(): acorn.Node;
+    jsx_parseAttribute(): acorn.Node;
+    jsx_parseOpeningElementAt(startPos: number, startLoc?: acorn.SourceLocation): acorn.Node;
+    jsx_parseClosingElementAt(startPos: number, startLoc?: acorn.SourceLocation): acorn.Node;
+    jsx_parseElementAt(startPos: number, startLoc?: acorn.SourceLocation): acorn.Node;
+    jsx_parseText(): acorn.Node;
+    jsx_parseElement(): acorn.Node;
+  }
 }
 
 export = jsx;