diff --git a/attn/attn_config.hpp b/attn/attn_config.hpp
index 32f885e..e8ef101 100644
--- a/attn/attn_config.hpp
+++ b/attn/attn_config.hpp
@@ -7,10 +7,11 @@
 /** @brief configuration flags */
 enum AttentionFlag
 {
-    enVital       = 0,
-    enCheckstop   = 1,
-    enTerminate   = 2,
-    enBreakpoints = 3,
+    enVital        = 0,
+    enCheckstop    = 1,
+    enTerminate    = 2,
+    enBreakpoints  = 3,
+    dfltBreakpoint = 4,
     lastFlag
 };