diff --git a/google/appengine.go b/google/appengine.go
index 850e0c0..fb46b5c 100644
--- a/google/appengine.go
+++ b/google/appengine.go
@@ -34,5 +34,5 @@ var appengineAppIDFunc func(c context.Context) string
 // context and scopes are not used. Please use DefaultTokenSource (or ComputeTokenSource,
 // which DefaultTokenSource will use in this case) instead.
 func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
-	return getAppEngineTokenSource(ctx, scope...)
+	return appEngineTokenSource(ctx, scope...)
 }
diff --git a/google/appengine_gen1.go b/google/appengine_gen1.go
index 8dc00b1..1ca0517 100644
--- a/google/appengine_gen1.go
+++ b/google/appengine_gen1.go
@@ -24,10 +24,10 @@ func init() {
 }
 
 // See comment on AppEngineTokenSource in appengine.go.
-func getAppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
+func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
 	scopes := append([]string{}, scope...)
 	sort.Strings(scopes)
-	return &appEngineTokenSource{
+	return &gaeTokenSource{
 		ctx:    ctx,
 		scopes: scopes,
 		key:    strings.Join(scopes, " "),
@@ -45,13 +45,13 @@ type tokenLock struct {
 	t  *oauth2.Token
 }
 
-type appEngineTokenSource struct {
+type gaeTokenSource struct {
 	ctx    context.Context
 	scopes []string
 	key    string // to aeTokens map; space-separated scopes
 }
 
-func (ts *appEngineTokenSource) Token() (*oauth2.Token, error) {
+func (ts *gaeTokenSource) Token() (*oauth2.Token, error) {
 	aeTokensMu.Lock()
 	tok, ok := aeTokens[ts.key]
 	if !ok {
diff --git a/google/appengine_gen2_flex.go b/google/appengine_gen2_flex.go
index 215b314..728c911 100644
--- a/google/appengine_gen2_flex.go
+++ b/google/appengine_gen2_flex.go
@@ -25,7 +25,7 @@ var (
 )
 
 // See comment on AppEngineTokenSource in appengine.go.
-func getAppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
+func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
 	once.Do(logFunc)
 	return ComputeTokenSource("")
 }