"AAR04"
diff --git a/core/build_id.mk b/core/build_id.mk
index 40bb35d..073f015 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -13,20 +13,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-
-#
-# Defines branch-specific values.
-#
-
 # BUILD_ID is usually used to specify the branch name
 # (like "MAIN") or a branch name and a release candidate
-# (like "TC1-RC5").  It must be a single word, and is
+# (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
-#
-BUILD_ID := MASTER
 
-# DISPLAY_BUILD_NUMBER should only be set for development branches,
-# If set, the BUILD_NUMBER (cl) is appended to the BUILD_ID for
-# a more descriptive BUILD_ID_DISPLAY, otherwise BUILD_ID_DISPLAY
-# is the same as BUILD_ID
-DISPLAY_BUILD_NUMBER := true
+export BUILD_ID=AAR04