diff --git a/build/terraform-beta b/build/terraform-beta
index 54ee93eb9bef..7f5588e229fa 160000
--- a/build/terraform-beta
+++ b/build/terraform-beta
@@ -1 +1 @@
-Subproject commit 54ee93eb9befcf8cf4765a153a1426f2dcdadf4e
+Subproject commit 7f5588e229faadc84f1432a8b178351194db062a
diff --git a/products/compute/api.yaml b/products/compute/api.yaml
index 410fc67ef661..ecc24c9c84d0 100644
--- a/products/compute/api.yaml
+++ b/products/compute/api.yaml
@@ -7340,13 +7340,13 @@ objects:
         input: true
         values:
           - :INTERNAL_HTTPS_LOAD_BALANCER
-          - :PRIVATE_RFC_1918
           - :PRIVATE
         description: |
-          The purpose of the resource. This field can be either PRIVATE_RFC_1918
+          The purpose of the resource. This field can be either PRIVATE
           or INTERNAL_HTTPS_LOAD_BALANCER. A subnetwork with purpose set to
           INTERNAL_HTTPS_LOAD_BALANCER is a user-created subnetwork that is
-          reserved for Internal HTTP(S) Load Balancing.
+          reserved for Internal HTTP(S) Load Balancing. If unspecified, the
+          purpose defaults to PRIVATE.
 
           If set to INTERNAL_HTTPS_LOAD_BALANCER you must also set the role.
       - !ruby/object:Api::Type::Enum