1 files changed, 3 insertions, 2 deletions

diff --git a/src/linda.c b/src/linda.c
index 98d2a8e..ee60ebc 100644
--- a/src/linda.c
+++ b/src/linda.c
@@ -46,6 +46,7 @@ THE SOFTWARE.
 */
 struct s_Linda
 {
+        DeepPrelude prelude; // Deep userdata MUST start with this header
         SIGNAL_T read_happened;
         SIGNAL_T write_happened;
         Universe* U; // the universe this linda belongs to
@@ -794,6 +795,7 @@ static void* linda_id( lua_State* L, DeepOp op_)
                         s = (struct s_Linda*) malloc( sizeof(struct s_Linda) + name_len); // terminating 0 is already included
                         if( s)
                         {
+                                s->prelude.magic.value = DEEP_VERSION.value;
                                 SIGNAL_INIT( &s->read_happened);
                                 SIGNAL_INIT( &s->write_happened);
                                 s->U = universe_get( L);
@@ -895,8 +897,7 @@ static void* linda_id( lua_State* L, DeepOp op_)
                         push_unique_key( L, NIL_SENTINEL);
                         lua_setfield(L, -2, "null");
 
-                        luaG_pushdeepversion( L);
-                        STACK_END( L, 2);
+                        STACK_END( L, 1);
                         return NULL;
                 }