diff --git a/psutil/__init__.py b/psutil/__init__.py
index 949fabc1d..dcf483d29 100644
--- a/psutil/__init__.py
+++ b/psutil/__init__.py
@@ -183,7 +183,7 @@
 
     # functions
     "pid_exists", "pids", "process_iter", "wait_procs",             # proc
-    "virtual_memory", "swap_memory",                                # memory
+    "virtual_memory", "swap_memory", "apply_zfs_arcstats",          # memory
     "cpu_times", "cpu_percent", "cpu_times_percent", "cpu_count",   # cpu
     "cpu_stats",  # "cpu_freq", "getloadavg"
     "net_io_counters", "net_connections", "net_if_addrs",           # network