diff --git a/monitor/misc.c b/monitor/misc.c
index 3baa15f3bf..6680734ea1 100644
--- a/monitor/misc.c
+++ b/monitor/misc.c
@@ -106,9 +106,6 @@ struct MonFdset {
     QLIST_ENTRY(MonFdset) next;
 };
 
-/* QMP checker flags */
-#define QMP_ACCEPT_UNKNOWNS 1
-
 /* Protects mon_fdsets */
 static QemuMutex mon_fdsets_lock;
 static QLIST_HEAD(, MonFdset) mon_fdsets;