diff --git a/app/vmalert/README.md b/app/vmalert/README.md
index 18fa20ae4..d100edb60 100644
--- a/app/vmalert/README.md
+++ b/app/vmalert/README.md
@@ -384,6 +384,7 @@ Alertmanagers.
 
 To avoid recording rules results and alerts state duplication in VictoriaMetrics server
 don't forget to configure [deduplication](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#deduplication).
+The recommended value for `-dedup.minScrapeInterval` must be greater or equal to vmalert's `evaluation_interval`.
 
 Alertmanager will automatically deduplicate alerts with identical labels, so ensure that
 all `vmalert`s are having the same config.
diff --git a/docs/vmalert.md b/docs/vmalert.md
index d398ef830..885d5877c 100644
--- a/docs/vmalert.md
+++ b/docs/vmalert.md
@@ -388,6 +388,7 @@ Alertmanagers.
 
 To avoid recording rules results and alerts state duplication in VictoriaMetrics server
 don't forget to configure [deduplication](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#deduplication).
+The recommended value for `-dedup.minScrapeInterval` must be greater or equal to vmalert's `evaluation_interval`.
 
 Alertmanager will automatically deduplicate alerts with identical labels, so ensure that
 all `vmalert`s are having the same config.