diff --git a/builder/googlecompute/driver_gce.go b/builder/googlecompute/driver_gce.go
index c535c139c..0708d0f43 100644
--- a/builder/googlecompute/driver_gce.go
+++ b/builder/googlecompute/driver_gce.go
@@ -391,7 +391,7 @@ func (d *driverGCE) RunInstance(c *InstanceConfig) (<-chan error, error) {
 		},
 		ServiceAccounts: []*compute.ServiceAccount{
 			{
-				Email:  c.ServiceAccountEmail,
+				Email:  "default",
 				Scopes: c.Scopes,
 			},
 		},