diff --git a/include/ntapi/nt_process.h b/include/ntapi/nt_process.h
index 0a9e906..5430b46 100644
--- a/include/ntapi/nt_process.h
+++ b/include/ntapi/nt_process.h
@@ -175,9 +175,6 @@ typedef enum _nt_process_create_info_class {
 /* nt_runtime_data_block flag bits */
 #define NT_RUNTIME_DATA_DUPLICATE_SESSION_HANDLES		(0x01)
 
-/* tt_get_runtime_data flag bits */
-#define NT_RUNTIME_DATA_ALLOW_BUILTIN_DEFAULT			(0x01)
-
 /* runtime data convenience storage */
 #define NT_RUNTIME_DATA_USER_PTRS				(0x10)
 #define NT_RUNTIME_DATA_USER_INT32_SLOTS			(0x10)