diff --git a/google-api-go-generator/gen.go b/google-api-go-generator/gen.go
index 56befdf257d..099414eb04e 100644
--- a/google-api-go-generator/gen.go
+++ b/google-api-go-generator/gen.go
@@ -732,6 +732,7 @@ func (a *API) GenerateCode() ([]byte, error) {
 	pn("var _ = strings.Replace")
 	pn("var _ = context.Canceled")
 	pn("var _ = internaloption.WithDefaultEndpoint")
+	pn("var _ = internal.Version")
 	pn("")
 	pn("const apiId = %q", a.doc.ID)
 	pn("const apiName = %q", a.doc.Name)