diff --git a/vendor/k8s.io/apimachinery/pkg/apimachinery/registered/registered.go b/vendor/k8s.io/apimachinery/pkg/apimachinery/registered/registered.go
index f2e32c88c..f1c96c43d 100644
--- a/vendor/k8s.io/apimachinery/pkg/apimachinery/registered/registered.go
+++ b/vendor/k8s.io/apimachinery/pkg/apimachinery/registered/registered.go
@@ -282,7 +282,12 @@ func (m *APIRegistrationManager) RESTMapper(versionPatterns ...schema.GroupVersi
 	for enabledVersion := range m.enabledVersions {
 		if !unionedGroups.Has(enabledVersion.Group) {
 			unionedGroups.Insert(enabledVersion.Group)
-			groupMeta := m.groupMetaMap[enabledVersion.Group]
+			groupMeta, found := m.groupMetaMap[enabledVersion.Group]
+			// TODO(r2d4): hack until tprs are decoupled from restMapper
+			if !found {
+				glog.Warningf("Could not find groupMeta for %s", enabledVersion.Group)
+				continue
+			}
 			unionMapper = append(unionMapper, groupMeta.RESTMapper)
 		}
 	}