diff --git a/lib/generate.js b/lib/generate.js
index b299a360..1a1ef0bf 100644
--- a/lib/generate.js
+++ b/lib/generate.js
@@ -193,6 +193,11 @@
         output += parser.customTokens.map(function (token) { return "declare var " + token + ": any;\n" }).join("")
         output += parser.body.join('\n');
         output += "\n";
+        output += "interface NearleyToken {";
+        output += "  value: any;\n";
+        output += "  [key: string]: any;\n";
+        output += "};\n";
+        output += "\n";
         output += "interface NearleyLexer {\n";
         output += "  reset: (chunk: string, info: any) => void;\n";
         output += "  next: () => NearleyToken | undefined;\n";