diff --git a/content/v2.0/reference/flux/functions/influxdb-v1/tagkeys.md b/content/v2.0/reference/flux/functions/influxdb-v1/tagkeys.md
index 385ca2de5..9588048c9 100644
--- a/content/v2.0/reference/flux/functions/influxdb-v1/tagkeys.md
+++ b/content/v2.0/reference/flux/functions/influxdb-v1/tagkeys.md
@@ -61,6 +61,7 @@ tagKeys = (bucket, predicate=(r) => true, start=-30d) =>
     |> filter(fn: predicate)
     |> keys()
     |> keep(columns: ["_value"])
+    |> distinct()
 ```
 
 _**Used functions:**