diff --git a/include/sys/arc_impl.h b/include/sys/arc_impl.h
index 9051fd2bf0..c5061695d9 100644
--- a/include/sys/arc_impl.h
+++ b/include/sys/arc_impl.h
@@ -619,6 +619,13 @@ typedef struct arc_stats {
 	 * Not updated directly; only synced in arc_kstat_update.
 	 */
 	kstat_named_t arcstat_bonus_size;
+#if defined(COMPAT_FREEBSD11)
+	/*
+	 * Sum of the previous three counters, provided for compatibility.
+	 */
+	kstat_named_t arcstat_other_size;
+#endif
+
 	/*
 	 * Total number of bytes consumed by ARC buffers residing in the
 	 * arc_anon state. This includes *all* buffers in the arc_anon
diff --git a/module/Makefile.bsd b/module/Makefile.bsd
index d0b4a5bd6e..53b97dafd9 100644
--- a/module/Makefile.bsd
+++ b/module/Makefile.bsd
@@ -33,7 +33,7 @@ CFLAGS+= -include ${INCDIR}/os/freebsd/spl/sys/ccompile.h
 
 CFLAGS+= -D__KERNEL__ -DFREEBSD_NAMECACHE -DBUILDING_ZFS  -D__BSD_VISIBLE=1 \
 	 -DHAVE_UIO_ZEROCOPY -DWITHOUT_NETDUMP -D__KERNEL -D_SYS_CONDVAR_H_ \
-	 -D_SYS_VMEM_H_ -DKDTRACE_HOOKS -DSMP -DHAVE_KSID
+	 -D_SYS_VMEM_H_ -DKDTRACE_HOOKS -DSMP -DHAVE_KSID -DCOMPAT_FREEBSD11
 
 .if ${MACHINE_ARCH} == "amd64"
 CFLAGS+= -DHAVE_AVX2 -DHAVE_AVX -D__x86_64 -DHAVE_SSE2 -DHAVE_AVX512F -DHAVE_SSSE3
diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index ff2621194d..fc62af7c76 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -512,6 +512,9 @@ arc_stats_t arc_stats = {
 	{ "dbuf_size",			KSTAT_DATA_UINT64 },
 	{ "dnode_size",			KSTAT_DATA_UINT64 },
 	{ "bonus_size",			KSTAT_DATA_UINT64 },
+#if defined(COMPAT_FREEBSD11)
+	{ "other_size",			KSTAT_DATA_UINT64 },
+#endif
 	{ "anon_size",			KSTAT_DATA_UINT64 },
 	{ "anon_evictable_data",	KSTAT_DATA_UINT64 },
 	{ "anon_evictable_metadata",	KSTAT_DATA_UINT64 },
@@ -7121,6 +7124,11 @@ arc_kstat_update(kstat_t *ksp, int rw)
 		ARCSTAT(arcstat_hdr_size) = aggsum_value(&astat_hdr_size);
 		ARCSTAT(arcstat_l2_hdr_size) = aggsum_value(&astat_l2_hdr_size);
 		ARCSTAT(arcstat_dbuf_size) = aggsum_value(&astat_dbuf_size);
+#if defined(COMPAT_FREEBSD11)
+		ARCSTAT(arcstat_other_size) = aggsum_value(&astat_bonus_size) +
+		    aggsum_value(&astat_dnode_size) +
+		    aggsum_value(&astat_dbuf_size);
+#endif
 		ARCSTAT(arcstat_dnode_size) = aggsum_value(&astat_dnode_size);
 		ARCSTAT(arcstat_bonus_size) = aggsum_value(&astat_bonus_size);
 		ARCSTAT(arcstat_abd_chunk_waste_size) =