diff --git a/config/Android.bp b/config/Android.bp
index a9449cc..cdef68e 100644
--- a/config/Android.bp
+++ b/config/Android.bp
@@ -23,6 +23,25 @@
 }
 
 soong_config_module_type {
+    name: "omni_weekly_build",
+    module_type: "cc_defaults",
+    config_namespace: "omniGlobalVars",
+    bool_variables: [
+        "useWeekly",
+    ],
+    properties: ["export_cflags"],
+}
+
+omni_weekly_build {
+    name: "omni_weekly_build_defaults",
+    soong_config_variables: {
+        useWeekly: {
+            export_cflags: ["-DUSE_WEEKLY_BUILD"],
+        },
+    },
+}
+
+soong_config_module_type {
     name: "aapt_version_code",
     module_type: "java_defaults",
     config_namespace: "omniGlobalVars",
diff --git a/config/BoardConfigSoong.mk b/config/BoardConfigSoong.mk
index 9ca2268..ce0ad6f 100644
--- a/config/BoardConfigSoong.mk
+++ b/config/BoardConfigSoong.mk
@@ -38,6 +38,7 @@
     launcher3Mock \
     targetNeedsHWCOnFirstRef \
     uses_metadata_as_fde_key \
+    useWeekly \
     target_use_sdclang \
     target_camera_needs_client_info \
     target_enforce_ab_ota_partition_list
@@ -79,6 +80,7 @@
 
 SOONG_CONFIG_omniGlobalVars_launcher3Gapps ?= false
 SOONG_CONFIG_omniGlobalVars_launcher3Mock ?= false
+SOONG_CONFIG_omniGlobalVars_useWeekly ?= false
 
 # Soong value variables
 SOONG_CONFIG_omniGlobalVars_additional_gralloc_10_usage_bits := $(TARGET_ADDITIONAL_GRALLOC_10_USAGE_BITS)
@@ -90,3 +92,7 @@
 else
     SOONG_CONFIG_omniGlobalVars_launcher3Mock := true
 endif
+
+ifeq ($(ROM_BUILDTYPE),WEEKLY)
+    SOONG_CONFIG_omniGlobalVars_useWeekly := true
+endif