diff --git a/isisd/isisd.h b/isisd/isisd.h
index 77de12e..7a9f764 100644
--- a/isisd/isisd.h
+++ b/isisd/isisd.h
@@ -144,5 +144,6 @@
 #define DEBUG_SPF_TRIGGERS               (1<<8)
 #define DEBUG_RTE_EVENTS                 (1<<9)
 #define DEBUG_EVENTS                     (1<<10)
+#define DEBUG_ZEBRA                      (1<<11)
 
 #endif /* ISISD_H */