diff --git a/config/Android.bp b/config/Android.bp
index 58a4f3c..a9449cc 100644
--- a/config/Android.bp
+++ b/config/Android.bp
@@ -213,6 +213,23 @@
 }
 
 soong_config_module_type {
+    name: "gralloc_handle_custom_content_md_reserved_size",
+    module_type: "cc_defaults",
+    config_namespace: "omniGlobalVars",
+    bool_variables: ["gralloc_handle_has_custom_content_md_reserved_size"],
+    properties: ["export_cflags"],
+}
+
+gralloc_handle_custom_content_md_reserved_size {
+    name: "gralloc_handle_has_custom_content_md_reserved_size_defaults",
+    soong_config_variables: {
+        gralloc_handle_has_custom_content_md_reserved_size: {
+            export_cflags: ["-DGRALLOC_HANDLE_HAS_CUSTOM_CONTENT_MD_RESERVED_SIZE"],
+        },
+    },
+}
+
+soong_config_module_type {
     name: "gralloc_10_usage_bits",
     module_type: "cc_defaults",
     config_namespace: "omniGlobalVars",