diff --git a/plugins/zfs/zfs_cache_efficiency b/plugins/zfs/zfs_cache_efficiency
index c65c7f77..8a433e21 100755
--- a/plugins/zfs/zfs_cache_efficiency
+++ b/plugins/zfs/zfs_cache_efficiency
@@ -71,6 +71,7 @@ hits.label Cache hits
 l2_abort_lowmem.graph no
 l2_abort_lowmem.min 0
 l2_abort_lowmem.type GAUGE
+l2_abort_lowmem.label l2_abort_lowmem?
 l2_cksum_bad.graph no
 l2_cksum_bad.min 0
 l2_cksum_bad.type DERIVE
@@ -78,15 +79,19 @@ l2_cksum_bad.label ARCL2 Bad checksum errors
 l2_evict_lock_retry.graph no
 l2_evict_lock_retry.min 0
 l2_evict_lock_retry.type DERIVE
+l2_evict_lock_retry.label l2_evict_lock_retry?
 l2_evict_reading.graph no
 l2_evict_reading.min 0
 l2_evict_reading.type DERIVE
+l2_evict_reading.label l2_evict_reading?
 l2_feeds.graph no
 l2_feeds.min 0
 l2_feeds.type DERIVE
+l2_feeds.label l2_feeds?
 l2_free_on_write.graph no
 l2_free_on_write.min 0
 l2_free_on_write.type DERIVE
+l2_free_on_write.label l2_free_on_write?
 l2_hits.graph no
 l2_hits.min 0
 l2_hits.type DERIVE
@@ -102,12 +107,15 @@ l2_misses.label L2ARC cache misses
 l2_rw_clash.graph no
 l2_rw_clash.min 0
 l2_rw_clash.type DERIVE
+l2_rw_clash.label l2_rw_clash?
 l2_writes_done.graph no
 l2_writes_done.min 0
 l2_writes_done.type DERIVE
+l2_writes_done.label l2_writes_done?
 l2_writes_error.graph no
 l2_writes_error.min 0
 l2_writes_error.type DERIVE
+l2_writes_error.label l2_writes_error?
 l2_writes_hdr_miss.graph no
 l2_writes_hdr_miss.min 0
 l2_writes_hdr_miss.type DERIVE
@@ -142,6 +150,7 @@ mru_hits.label Most recently used hits
 mutex_miss.graph no
 mutex_miss.min 0
 mutex_miss.type DERIVE
+mutex_miss.label mutex_miss?
 prefetch_data_hits.graph no
 prefetch_data_hits.min 0
 prefetch_data_hits.type DERIVE