diff --git a/CHANGELOG.md b/CHANGELOG.md
index c11b92a..b8da524 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,8 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.0.1]
+
+### Fixed
+
+- Check if typeof link is undefined (#3)
+
 ## [1.0.0]
 
 First release
 
 [1.0.0]: https://github.com/photogabble/eleventy-plugin-font-subsetting/releases/tag/v1.0.0
+[1.0.1]: https://github.com/photogabble/eleventy-plugin-font-subsetting/releases/tag/v1.0.1
diff --git a/index.js b/index.js
index 9559252..b312464 100644
--- a/index.js
+++ b/index.js
@@ -143,7 +143,7 @@ module.exports = function (eleventyConfig, options = {}) {
 
               return aliases.has(link.slug);
             }))
-            .filter(link => (typeof link !== undefined))
+            .filter(link => (typeof link !== 'undefined'))
             .forEach(link => compilePromises.push(compileTemplate(link)))
         }
 
diff --git a/package.json b/package.json
index 86d5378..c82040a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@photogabble/eleventy-plugin-interlinker",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Obsidian WikiLinks, BackLinks and Embed support for 11ty",
   "keywords": [
     "11ty",