diff --git a/hack/crd-gen-refs/config.yaml b/hack/crd-gen-refs/config.yaml
index 74b2051..c633246 100644
--- a/hack/crd-gen-refs/config.yaml
+++ b/hack/crd-gen-refs/config.yaml
@@ -1,9 +1,6 @@
 processor:
   ignoreGroupVersions:
     - "GVK"
-  customMarkers:
-    - name: "optional"
-      target: field
   ignoreFields:
 #    - "status$"
     - "TypeMeta$"
diff --git a/hack/crd-gen-refs/markdown/type.tpl b/hack/crd-gen-refs/markdown/type.tpl
index 525f7c1..db1648a 100644
--- a/hack/crd-gen-refs/markdown/type.tpl
+++ b/hack/crd-gen-refs/markdown/type.tpl
@@ -31,7 +31,7 @@ _Appears in:_
 {{ end -}}
 
 {{ range $type.Members -}}
-| `{{ .Name  }}` _{{ markdownRenderType .Type }}_ | {{ template "type_members" . }} | {{ if not .Markers.optional -}}True{{- end }} | {{ markdownRenderDefault .Default }} | {{ range .Validation -}} {{ markdownRenderFieldDoc . }} <br />{{ end }} |
+| `{{ .Name  }}` _{{ markdownRenderType .Type }}_ | {{ template "type_members" . }} | {{ if not .Markers.optional -}}True{{- end }} | {{ markdownRenderDefault .Default }} | {{ range .Validation -}}{{- $v := markdownRenderFieldDoc . }}{{- if and $v (ne $v "Optional: {}") (ne $v "Optional: \\{\\}") -}} {{ $v }} <br />{{ end }}{{- end }} |
 {{ end -}}
 
 {{ end -}}