diff --git a/build/soong/Android.bp b/build/soong/Android.bp
index 6df8f7f..3c5a0b8 100644
--- a/build/soong/Android.bp
+++ b/build/soong/Android.bp
@@ -192,6 +192,23 @@
     },
 }
 
+soong_config_module_type {
+    name: "gralloc_handle_reserved_size",
+    module_type: "cc_defaults",
+    config_namespace: "omniGlobalVars",
+    bool_variables: ["gralloc_handle_has_reserved_size"],
+    properties: ["cflags"],
+}
+
+gralloc_handle_reserved_size {
+    name: "gralloc_handle_has_reserved_size_defaults",
+    soong_config_variables: {
+        gralloc_handle_has_reserved_size: {
+            cflags: ["-DGRALLOC_HANDLE_HAS_RESERVED_SIZE"],
+        },
+    },
+}
+
 // QCOM specific config modules
 soong_config_module_type {
     name: "metadata_fde_key",