diff --git a/lib/errors.js b/lib/errors.js
index 617f1e8..882c4e5 100644
--- a/lib/errors.js
+++ b/lib/errors.js
@@ -29,16 +29,26 @@ class MissingPageError extends TldrError {
 Page not found.
 If you want to contribute it, feel free to send a pull request to: ${repo}
     `);
-    this.name = 'MissingPageErrror';
+    this.name = 'MissingPageError';
     // eslint-disable-next-line no-magic-numbers
     this.code = 3;
   }
 }
 
+class MissingRenderPathError extends TldrError {
+  constructor() {
+    super('Option --render needs an argument.');
+    this.name = 'MissingRenderPathError';
+    // eslint-disable-next-line no-magic-numbers
+    this.code = 4;
+  }
+}
+
 module.exports = {
   TldrError,
   EmptyCacheError,
-  MissingPageError
+  MissingPageError,
+  MissingRenderPathError
 };
 
 function trim(strings, ...values) {
diff --git a/lib/tldr.js b/lib/tldr.js
index 3c0ffcb..823e0fc 100644
--- a/lib/tldr.js
+++ b/lib/tldr.js
@@ -4,7 +4,7 @@ const sample = require('lodash/sample');
 const fs = require('fs-extra');
 const ms = require('ms');
 const ora = require('ora');
-const { EmptyCacheError, MissingPageError } = require('./errors');
+const { EmptyCacheError, MissingPageError, MissingRenderPathError } = require('./errors');
 const Cache = require('./cache');
 const search = require('./search');
 const platform = require('./platform');
@@ -73,6 +73,9 @@ class Tldr {
   }
 
   render(file) {
+    if (typeof file !== 'string') {
+      throw new MissingRenderPathError();
+    }
     return fs.readFile(file, 'utf8')
       .then((content) => {
         // Getting the shortindex first to populate the shortindex var