diff --git a/sys/kern/subr_witness.c b/sys/kern/subr_witness.c
--- a/sys/kern/subr_witness.c
+++ b/sys/kern/subr_witness.c
@@ -1124,7 +1124,7 @@
 	int i, j;
 
 	if (witness_cold || witness_watch < 1 || lock->lo_witness == NULL ||
-	    KERNEL_PANICKED())
+	    KERNEL_PANICKED() || rebooting)
 		return;
 
 	w = lock->lo_witness;