diff --git a/docs/js/convert-old-anchorid.js b/docs/js/convert-old-anchorid.js
index fd8054019c2..5f651092f6e 100644
--- a/docs/js/convert-old-anchorid.js
+++ b/docs/js/convert-old-anchorid.js
@@ -5,7 +5,7 @@ window.addEventListener('DOMContentLoaded', () => {
 
   // only operate on the old id's
   if (!/^#\w+_\w+(?:-\w+)?$/i.test(anchor)) {
-    return;
+    return fixNoAsyncFn();
   }
 
   // in case there is no anchor, return without modifying the anchor
@@ -68,4 +68,25 @@ window.addEventListener('DOMContentLoaded', () => {
       window.location.hash = `#${test}`;
     }
   }
+
+  // function to fix dox not recognizing async functions and resulting in inproper anchors
+  function fixNoAsyncFn() {
+    const anchorSlice = anchor.slice(1);
+    // dont modify anchor if it already exists
+    if (document.querySelector(`h3[id="${anchorSlice}"`)) {
+      return;
+    }
+
+    const tests = [
+      `${anchorSlice}()`
+    ];
+
+    for (const test of tests) {
+      // have to use the "[id=]" selector because "#Something()" is not a valid selector (the "()" part)
+      const header = document.querySelector(`h3[id="${test}"]`);
+      if (header) {
+        window.location.hash = `#${test}`;
+      }
+    }
+  }
 }, { once: true });
diff --git a/docs/source/api.js b/docs/source/api.js
index 4eab51320fe..de6bfe2e0fe 100644
--- a/docs/source/api.js
+++ b/docs/source/api.js
@@ -41,6 +41,53 @@ const files = [
 
 const out = module.exports.docs = [];
 
+// add custom matchers to dox, to recognize things it does not know about
+// see https://github.com/tj/dox/issues/198
+{
+  // Some matchers need to be in a specific order, like the "prototype" matcher must be before the static matcher (and inverted because "unshift")
+
+  // "unshift" is used, because the first function to return a object from "contextPatternMatchers" is used (and we need to "overwrite" those specific functions)
+
+  // push a matcher to recognize "Class.fn = async function" as a method
+  dox.contextPatternMatchers.unshift(function(str) {
+    const match = /^\s*([\w$.]+)\s*\.\s*([\w$]+)\s*=\s*(?:async\s+)?function/.exec(str);
+    if (match) {
+      return {
+        type: 'method',
+        receiver: match[1],
+        name: match[2],
+        string: match[1] + '.' + match[2] + '()'
+      };
+    }
+  });
+
+  // push a matcher to recognize "Class.prototype.fn = async function" as a method
+  dox.contextPatternMatchers.unshift(function(str) {
+    const match = /^\s*([\w$.]+)\s*\.\s*prototype\s*\.\s*([\w$]+)\s*=\s*(?:async\s+)?function/.exec(str);
+    if (match) {
+      return {
+        type: 'method',
+        constructor: match[1],
+        cons: match[1],
+        name: match[2],
+        string: match[1] + '.prototype.' + match[2] + '()'
+      };
+    }
+  });
+
+  // push a matcher to recognize "async function" as a function
+  dox.contextPatternMatchers.unshift(function(str) {
+    const match = /^\s*(export(\s+default)?\s+)?(?:async\s+)?function\s+([\w$]+)\s*\(/.exec(str);
+    if (match) {
+      return {
+        type: 'function',
+        name: match[3],
+        string: match[3] + '()'
+      };
+    }
+  });
+}
+
 const combinedFiles = [];
 for (const file of files) {
   try {