diff --git a/api/openapi-spec/swagger.json b/api/openapi-spec/swagger.json
index 3319cf81b95..4417cc9eef4 100644
--- a/api/openapi-spec/swagger.json
+++ b/api/openapi-spec/swagger.json
@@ -6120,7 +6120,7 @@
         },
         "fieldRef": {
           "$ref": "#/definitions/io.k8s.api.core.v1.ObjectFieldSelector",
-          "description": "Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs."
+          "description": "Selects a field of the pod: supports metadata.name, metadata.namespace, `metadata.labels['<KEY>']`, `metadata.annotations['<KEY>']`, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs."
         },
         "resourceFieldRef": {
           "$ref": "#/definitions/io.k8s.api.core.v1.ResourceFieldSelector",
diff --git a/pkg/apis/core/types.go b/pkg/apis/core/types.go
index 3944d5dcadc..4c1a2f9cf53 100644
--- a/pkg/apis/core/types.go
+++ b/pkg/apis/core/types.go
@@ -1774,7 +1774,7 @@ type EnvVar struct {
 // EnvVarSource represents a source for the value of an EnvVar.
 // Only one of its fields may be set.
 type EnvVarSource struct {
-	// Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations,
+	// Selects a field of the pod: supports metadata.name, metadata.namespace, `metadata.labels['<KEY>']`, `metadata.annotations['<KEY>']`,
 	// metadata.uid, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.
 	// +optional
 	FieldRef *ObjectFieldSelector
diff --git a/staging/src/k8s.io/api/core/v1/generated.proto b/staging/src/k8s.io/api/core/v1/generated.proto
index b4bb018a89f..9babe37bb61 100644
--- a/staging/src/k8s.io/api/core/v1/generated.proto
+++ b/staging/src/k8s.io/api/core/v1/generated.proto
@@ -1166,7 +1166,7 @@ message EnvVar {
 
 // EnvVarSource represents a source for the value of an EnvVar.
 message EnvVarSource {
-  // Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations,
+  // Selects a field of the pod: supports metadata.name, metadata.namespace, `metadata.labels['<KEY>']`, `metadata.annotations['<KEY>']`,
   // spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.
   // +optional
   optional ObjectFieldSelector fieldRef = 1;
diff --git a/staging/src/k8s.io/api/core/v1/types.go b/staging/src/k8s.io/api/core/v1/types.go
index a48528bc75f..197684de76c 100644
--- a/staging/src/k8s.io/api/core/v1/types.go
+++ b/staging/src/k8s.io/api/core/v1/types.go
@@ -1857,7 +1857,7 @@ type EnvVar struct {
 
 // EnvVarSource represents a source for the value of an EnvVar.
 type EnvVarSource struct {
-	// Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations,
+	// Selects a field of the pod: supports metadata.name, metadata.namespace, `metadata.labels['<KEY>']`, `metadata.annotations['<KEY>']`,
 	// spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.
 	// +optional
 	FieldRef *ObjectFieldSelector `json:"fieldRef,omitempty" protobuf:"bytes,1,opt,name=fieldRef"`
diff --git a/staging/src/k8s.io/api/core/v1/types_swagger_doc_generated.go b/staging/src/k8s.io/api/core/v1/types_swagger_doc_generated.go
index ce4e7bdac74..13325261274 100644
--- a/staging/src/k8s.io/api/core/v1/types_swagger_doc_generated.go
+++ b/staging/src/k8s.io/api/core/v1/types_swagger_doc_generated.go
@@ -568,7 +568,7 @@ func (EnvVar) SwaggerDoc() map[string]string {
 
 var map_EnvVarSource = map[string]string{
 	"":                 "EnvVarSource represents a source for the value of an EnvVar.",
-	"fieldRef":         "Selects a field of the pod: supports metadata.name, metadata.namespace, metadata.labels, metadata.annotations, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.",
+	"fieldRef":         "Selects a field of the pod: supports metadata.name, metadata.namespace, `metadata.labels['<KEY>']`, `metadata.annotations['<KEY>']`, spec.nodeName, spec.serviceAccountName, status.hostIP, status.podIP, status.podIPs.",
 	"resourceFieldRef": "Selects a resource of the container: only resources limits and requests (limits.cpu, limits.memory, limits.ephemeral-storage, requests.cpu, requests.memory and requests.ephemeral-storage) are currently supported.",
 	"configMapKeyRef":  "Selects a key of a ConfigMap.",
 	"secretKeyRef":     "Selects a key of a secret in the pod's namespace",