1 files changed, 10 insertions, 2 deletions
diff --git a/mask.h b/mask.h
index 538316be..8213a346 100644
--- a/mask.h
+++ b/mask.h
@@ -36,17 +36,25 @@
 
 namespace ledger {
 
-class mask_t
+class mask_t : public supports_flags<>
 {
   mask_t();
 
 public:
+#define MASK_SHORT_ACCOUNT  0x01
+#define MASK_CODE           0x02
+#define MASK_COMMODITY      0x04
+#define MASK_PAYEE          0x08
+#define MASK_NOTE           0x10
+#define MASK_ACCOUNT        0x20
+
   bool	       exclude;
   boost::regex expr;
 
   explicit mask_t(const string& pattern);
 
-  mask_t(const mask_t& m) : exclude(m.exclude), expr(m.expr) {
+  mask_t(const mask_t& m)
+    : supports_flags<>(), exclude(m.exclude), expr(m.expr) {
     TRACE_CTOR(mask_t, "copy");
   }
   ~mask_t() throw() {