diff --git a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/doc.go b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/doc.go
index 43d883ad615..083943d1c7b 100644
--- a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/doc.go
+++ b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/doc.go
@@ -15,5 +15,5 @@ limitations under the License.
 */
 
 // +k8s:deepcopy-gen=package,register
-// +groupName=custom-metrics.metrics.k8s.io
+// +groupName=custom.metrics.k8s.io
 package custom_metrics
diff --git a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/register.go b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/register.go
index e94bb007857..091fcc483d5 100644
--- a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/register.go
+++ b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/register.go
@@ -22,7 +22,7 @@ import (
 )
 
 // GroupName is the group name use in this package
-const GroupName = "custom-metrics.metrics.k8s.io"
+const GroupName = "custom.metrics.k8s.io"
 
 // SchemeGroupVersion is group version used to register these objects
 var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: runtime.APIVersionInternal}
diff --git a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1/register.go b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1/register.go
index 7a202143307..9594ea9e00c 100644
--- a/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1/register.go
+++ b/staging/src/k8s.io/metrics/pkg/apis/custom_metrics/v1beta1/register.go
@@ -23,7 +23,7 @@ import (
 )
 
 // GroupName is the group name use in this package
-const GroupName = "custom-metrics.metrics.k8s.io"
+const GroupName = "custom.metrics.k8s.io"
 
 // SchemeGroupVersion is group version used to register these objects
 var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1beta1"}