diff --git a/packages/mermaid/src/docs/syntax/gantt.md b/packages/mermaid/src/docs/syntax/gantt.md
index 920869fba..b51b3ab5c 100644
--- a/packages/mermaid/src/docs/syntax/gantt.md
+++ b/packages/mermaid/src/docs/syntax/gantt.md
@@ -183,8 +183,8 @@ tickInterval 1day
 
 The pattern is:
 
-```markdown
-/^([1-9][0-9]\*)(minute|hour|day|week|month)$/
+```javascript
+/^([1-9][0-9]*)(minute|hour|day|week|month)$/
 ```
 
 More info in: [https://github.com/d3/d3-time#interval_every](https://github.com/d3/d3-time#interval_every)