diff --git a/docs/sources/clients/promtail/scraping.md b/docs/sources/clients/promtail/scraping.md
index 1283ed1f9f1c..aa39797a26e4 100644
--- a/docs/sources/clients/promtail/scraping.md
+++ b/docs/sources/clients/promtail/scraping.md
@@ -315,6 +315,8 @@ see the [configuration](../../configuration/#kafka) section for more information
 
 ## GELF
 
+<span style="background-color:#f3f973;">GELF support in Promtail is an experimental feature.</span>
+
 Promtail supports listening message using the [GELF](https://docs.graylog.org/docs/gelf) UDP protocol.
 The GELF targets can be configured using the `gelf` stanza: