diff --git a/include/vmp2.hpp b/include/vmp2.hpp
index aaa52a2..4c2919b 100644
--- a/include/vmp2.hpp
+++ b/include/vmp2.hpp
@@ -266,6 +266,7 @@ namespace vmp2
 
         struct rtn_t
         {
+            u32 size;
             u32 code_block_count;
             vmp2::v4::code_block_t code_blocks[ 1 ];
         };