diff --git a/google/resource_compute_instance.go b/google/resource_compute_instance.go
index 46a7dbd0..684a7869 100644
--- a/google/resource_compute_instance.go
+++ b/google/resource_compute_instance.go
@@ -287,7 +287,7 @@ func resourceComputeInstance() *schema.Resource {
 
 			"create_timeout": {
 				Type:     schema.TypeInt,
-				Optional: true,
+				Computed: true,
 				Removed:  "Use timeouts block instead.",
 			},