diff --git a/docs/config/usage.md b/docs/config/usage.md
index 1069ffa5f..0ab60012f 100644
--- a/docs/config/usage.md
+++ b/docs/config/usage.md
@@ -348,10 +348,10 @@ mermaid.parseError = function (err, hash) {
   displayErrorInGui(err);
 };
 
-const textFieldUpdated = function () {
+const textFieldUpdated = async function () {
   const textStr = getTextFromFormField('code');
 
-  if (mermaid.parse(textStr)) {
+  if (await mermaid.parse(textStr)) {
     reRender(textStr);
   }
 };
diff --git a/packages/mermaid/src/docs/config/usage.md b/packages/mermaid/src/docs/config/usage.md
index 211a06af7..1c2b5a39b 100644
--- a/packages/mermaid/src/docs/config/usage.md
+++ b/packages/mermaid/src/docs/config/usage.md
@@ -345,10 +345,10 @@ mermaid.parseError = function (err, hash) {
   displayErrorInGui(err);
 };
 
-const textFieldUpdated = function () {
+const textFieldUpdated = async function () {
   const textStr = getTextFromFormField('code');
 
-  if (mermaid.parse(textStr)) {
+  if (await mermaid.parse(textStr)) {
     reRender(textStr);
   }
 };