diff --git a/docs/advanced_usage.md b/docs/advanced_usage.md
index c7a7070f3..b19f73acf 100644
--- a/docs/advanced_usage.md
+++ b/docs/advanced_usage.md
@@ -504,7 +504,7 @@ invoices/
 {{ custom_fields|get_cf_value("Date Field")|datetime('%Y') }}/
 {{ custom_fields|get_cf_value("Date Field")|datetime('%m') }}/
 {{ custom_fields|get_cf_value("Date Field")|datetime('%d') }}/
-Invoice_{{ custom_fields|get_cf_value:"Select Field" }}_{{ custom_fields|get_cf_value("Date Field")|replace("-", "") }}.pdf
+Invoice_{{ custom_fields|get_cf_value("Select Field") }}_{{ custom_fields|get_cf_value("Date Field")|replace("-", "") }}.pdf
 ```
 
 This will create a path like `invoices/2022/01/01/Invoice_OptionTwo_20220101.pdf` if the custom field "Date Field" is set to January 1, 2022 and "Select Field" is set to `OptionTwo`.