Index: lib/libmemstat/memstat_uma.c
===================================================================
--- lib/libmemstat/memstat_uma.c
+++ lib/libmemstat/memstat_uma.c
@@ -455,9 +455,8 @@
 			mtp->mt_byteslimit = mtp->mt_countlimit * mtp->mt_size;
 			mtp->mt_count = mtp->mt_numallocs - mtp->mt_numfrees;
 			for (i = 0; i < ndomains; i++) {
-				ret = kread(kvm,
-				    &uz.uz_cpu[mp_maxid + 1] + i * sizeof(uzd),
-				    &uzd, sizeof(uzd), 0);
+				ret = kread(kvm, ZDOM_GET(uzp, i), &uzd,
+				    sizeof(uzd), 0);
 				if (ret != 0)
 					continue;
 				for (ubp =
Index: sys/vm/uma_int.h
===================================================================
--- sys/vm/uma_int.h
+++ sys/vm/uma_int.h
@@ -526,6 +526,10 @@
 	KASSERT(uma_zone_get_allocs((z)) == 0,				\
 	    ("zone %s initialization after use.", (z)->uz_name))
 
+/* Domains are contiguous after the last CPU */
+#define	ZDOM_GET(z, n)							\
+    (&((uma_zone_domain_t)&(z)->uz_cpu[mp_maxid + 1])[n])
+
 #undef	UMA_ALIGN
 
 #ifdef _KERNEL
@@ -561,10 +565,6 @@
 	KASSERT(uma_keg_get_allocs((k)) == 0,				\
 	    ("keg %s initialization after use.", (k)->uk_name))
 
-/* Domains are contiguous after the last CPU */
-#define	ZDOM_GET(z, n)							\
-    (&((uma_zone_domain_t)&(z)->uz_cpu[mp_maxid + 1])[n])
-
 #define	ZDOM_LOCK_INIT(z, zdom, lc)					\
 	do {								\
 		if ((lc))						\