diff --git a/pkg/apis/core/validation/validation.go b/pkg/apis/core/validation/validation.go
index c2709e8d82e..d432bd0ae1a 100644
--- a/pkg/apis/core/validation/validation.go
+++ b/pkg/apis/core/validation/validation.go
@@ -2882,10 +2882,10 @@ func validateHandler(handler commonHandler, fldPath *field.Path) field.ErrorList
 	}
 	if handler.GRPC != nil {
 		if numHandlers > 0 {
-			allErrors = append(allErrors, field.Forbidden(fldPath.Child("gRPC"), "may not specify more than 1 handler type"))
+			allErrors = append(allErrors, field.Forbidden(fldPath.Child("grpc"), "may not specify more than 1 handler type"))
 		} else {
 			numHandlers++
-			allErrors = append(allErrors, validateGRPCAction(handler.GRPC, fldPath.Child("gRPC"))...)
+			allErrors = append(allErrors, validateGRPCAction(handler.GRPC, fldPath.Child("grpc"))...)
 		}
 	}
 	if numHandlers == 0 {
diff --git a/staging/src/k8s.io/api/core/v1/types.go b/staging/src/k8s.io/api/core/v1/types.go
index 144767c2dab..80c5dd744c1 100644
--- a/staging/src/k8s.io/api/core/v1/types.go
+++ b/staging/src/k8s.io/api/core/v1/types.go
@@ -2468,7 +2468,7 @@ type ProbeHandler struct {
 	// This is an alpha field and requires enabling GRPCContainerProbe feature gate.
 	// +featureGate=GRPCContainerProbe
 	// +optional
-	GRPC *GRPCAction `json:"gRPC,omitempty" protobuf:"bytes,4,opt,name=grpc"`
+	GRPC *GRPCAction `json:"grpc,omitempty" protobuf:"bytes,4,opt,name=grpc"`
 }
 
 // LifecycleHandler defines a specific action that should be taken in a lifecycle