diff --git a/base/include/flat_obj.h b/base/include/flat_obj.h
index 1691998f83836aee00786717cf6cd36e1ebbbb20..24d149ab110cedf72b66b943c5d3330ed16ab775 100644
--- a/base/include/flat_obj.h
+++ b/base/include/flat_obj.h
@@ -41,6 +41,16 @@
     typedef __u64 binder_uintptr_t;
 #endif
 
+#if INTPTR_MAX == INT32_MAX
+#define BINDER_IPC_32BIT
+#elif INTPTR_MAX == INT64_MAX
+#ifdef BINDER_IPC_32BIT
+#undef BINDER_IPC_32BIT
+#endif
+#else
+#error "Environment not 32 or 64 bit system."
+#endif
+
 struct parcel_binder_object_header {
     __u32 type;
 };