diff --git a/docs/sources/datasources/influxdb.md b/docs/sources/datasources/influxdb.md
index 05e627967eb..03dab9a362a 100644
--- a/docs/sources/datasources/influxdb.md
+++ b/docs/sources/datasources/influxdb.md
@@ -62,6 +62,7 @@ You can switch to raw query mode by pressing the pen icon.
 
 - $m = replaced with measurement name
 - $measurement = replaced with measurement name
+- $col = replaced with column name
 - $tag_hostname = replaced with the value of the hostname tag
 - You can also use [[tag_hostname]] pattern replacement syntax