diff --git a/github/util_v4_repository.go b/github/util_v4_repository.go
index 4d1eccdbb7..1a070b5a74 100644
--- a/github/util_v4_repository.go
+++ b/github/util_v4_repository.go
@@ -2,6 +2,7 @@ package github
 
 import (
 	"context"
+	"encoding/base64"
 	"errors"
 
 	"github.com/shurcooL/githubv4"
@@ -15,6 +16,12 @@ func getRepositoryID(name string, meta interface{}) (githubv4.ID, error) {
 		return githubv4.ID(name), nil
 	}
 
+	// Interpret `name` as a legacy node ID
+	exists, _ = repositoryLegacyNodeIDExists(name, meta)
+	if exists {
+		return githubv4.ID(name), nil
+	}
+
 	// Could not find repo by node ID, interpret `name` as repo name
 	var query struct {
 		Repository struct {
@@ -59,3 +66,31 @@ func repositoryNodeIDExists(name string, meta interface{}) (bool, error) {
 
 	return query.Node.ID.(string) == name, nil
 }
+
+// Maintain compatibility with deprecated Global ID format
+// https://github.blog/2021-02-10-new-global-id-format-coming-to-graphql/
+func repositoryLegacyNodeIDExists(name string, meta interface{}) (bool, error) {
+	// Check if the name is a base 64 encoded node ID
+	_, err := base64.StdEncoding.DecodeString(name)
+	if err != nil {
+		return false, nil
+	}
+
+	// API check if node ID exists
+	var query struct {
+		Node struct {
+			ID githubv4.ID
+		} `graphql:"node(id:$id)"`
+	}
+	variables := map[string]interface{}{
+		"id": githubv4.ID(name),
+	}
+	ctx := context.Background()
+	client := meta.(*Owner).v4client
+	err = client.Query(ctx, &query, variables)
+	if err != nil {
+		return false, err
+	}
+
+	return query.Node.ID.(string) == name, nil
+}