diff --git a/README.md b/README.md
index 2d3b364..c9d1726 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ To validate and clean a CSV file you must specify input and output files using t
 $ python -m csv_metadata_quality -i data/test.csv -o /tmp/test.csv
 ```
 
-You can enable "unsafe fixes" with the `--unsafe-fixes` option. This will attempt
+You can enable "unsafe fixes" with the `--unsafe-fixes` option. This will attempt to fix things like invalid multi-value separators ("|"). It's possible that a metadata value could legitimately use "|" but in my experience this is rather always an error where the user meant to enter multiple values for a field, for example Kenya||Tanzania.
 
 ## Todo