diff --git a/docs/spec/v2/helmreleases.md b/docs/spec/v2/helmreleases.md
index d437ef905..e5c569ad1 100644
--- a/docs/spec/v2/helmreleases.md
+++ b/docs/spec/v2/helmreleases.md
@@ -1658,6 +1658,16 @@ to perform a Helm install or upgrade with in the
 The revision is used by the controller to determine if it should reset the
 [failure counters](#failure-counters) due to a change in the chart version.
 
+### Last Attempted Post Renderers Digest
+
+The helm-controller reports the digest for the [post renderers](#post-renderers)
+it last attempted to perform a Helm install or upgrade with in the
+`.status.lastAttemptedPostRenderersDigest` field.
+
+This field is used by the controller to determine if a deployed Helm release
+is in sync with the HelmRelease `spec.PostRenderers` configuration and whether
+it should trigger a Helm upgrade.
+
 ### Last Attempted Release Action
 
 The helm-controller reports the last Helm release action it attempted to