diff --git a/staging/src/k8s.io/api/core/v1/types.go b/staging/src/k8s.io/api/core/v1/types.go
index 3f6a6211b21..b251e5f341c 100644
--- a/staging/src/k8s.io/api/core/v1/types.go
+++ b/staging/src/k8s.io/api/core/v1/types.go
@@ -2133,6 +2133,7 @@ type Probe struct {
 	// Value must be non-negative integer. The value zero indicates stop immediately via
 	// the kill signal (no opportunity to shut down).
 	// This is an alpha field and requires enabling ProbeTerminationGracePeriod feature gate.
+	// Minimum value is 1. spec.terminationGracePeriodSeconds is used if unset.
 	// +optional
 	TerminationGracePeriodSeconds *int64 `json:"terminationGracePeriodSeconds,omitempty" protobuf:"varint,7,opt,name=terminationGracePeriodSeconds"`
 }