diff --git a/gmqcc.h b/gmqcc.h
index bc64d56..787fb1d 100644
--- a/gmqcc.h
+++ b/gmqcc.h
@@ -881,6 +881,8 @@ typedef struct qc_program_s {
     MEM_VECTOR_MAKE(qc_exec_stack, stack);
     size_t statement;
 
+    size_t xflags;
+
     int    argc; /* current arg count for debugging */
 } qc_program;