diff --git a/lib/saxes.js b/lib/saxes.js
index a1920d82..0a8ea1a5 100644
--- a/lib/saxes.js
+++ b/lib/saxes.js
@@ -1114,7 +1114,7 @@ ${XML_NAMESPACE}.`);
 
     let num = NaN;
     if (entity[0] === "#") {
-      if ((entity[1] === "x" || entity[1] === "X") &&
+      if ((entity[1] === "x") &&
           /^#[x|X][0-9a-fA-F]+$/.test(entity)) {
         num = parseInt(entity.slice(2), 16);
       }
diff --git a/test/issue-35.js b/test/issue-35.js
index 0de9e3f0..d27916ba 100644
--- a/test/issue-35.js
+++ b/test/issue-35.js
@@ -3,7 +3,7 @@
 // https://github.com/isaacs/sax-js/issues/35
 require(".").test({
   name: "issue 35 (leading 0 in entity numeric code)",
-  xml: "<xml>&#Xd;&#X0d;\n</xml>",
+  xml: "<xml>&#xd;&#x0d;\n</xml>",
   expect: [
     ["opentagstart", { name: "xml", attributes: {} }],
     ["opentag", { name: "xml", attributes: {}, isSelfClosing: false }],