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-rw-r--r--kern/lock.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kern/lock.c b/kern/lock.c
index a604761..909aa46 100644
--- a/kern/lock.c
+++ b/kern/lock.c
@@ -42,6 +42,7 @@
#include <kern/sched_prim.h>
#if MACH_KDB
#include <machine/db_machdep.h>
+#include <ddb/db_output.h>
#include <ddb/db_sym.h>
#endif