1 files changed, 1 insertions, 0 deletions

diff --git a/lua.h b/lua.h
index 5fbc9d34..aefa3b8c 100644
--- a/lua.h
+++ b/lua.h
@@ -504,6 +504,7 @@ struct lua_Debug {
   unsigned char nups;   /* (u) number of upvalues */
   unsigned char nparams;/* (u) number of parameters */
   char isvararg;        /* (u) */
+  unsigned char extraargs;  /* (t) number of extra arguments */
   char istailcall;      /* (t) */
   int ftransfer;   /* (r) index of first value transferred */
   int ntransfer;   /* (r) number of transferred values */