diff --git a/docs/configuration/source-config.md b/docs/configuration/source-config.md
index b882d328c8a..04e0369f8c9 100644
--- a/docs/configuration/source-config.md
+++ b/docs/configuration/source-config.md
@@ -230,6 +230,7 @@ The following is an example of how one could parse and transform a CSV dataset c
 ```yaml
 # Your source config here
 # ...
+input_format: plain_text
 transform:
   script: |
     user = parse_csv!(.plain_text)