diff -up nfs-utils-2.5.1/tools/mountstats/mountstats.py.orig nfs-utils-2.5.1/tools/mountstats/mountstats.py
--- nfs-utils-2.5.1/tools/mountstats/mountstats.py.orig	2020-09-08 10:59:58.289384682 -0400
+++ nfs-utils-2.5.1/tools/mountstats/mountstats.py	2020-09-08 14:02:05.560514346 -0400
@@ -951,10 +951,11 @@ def print_iostat_summary(old, new, devic
         if not old or device not in old:
             stats.display_iostats(time)
         else:
-            old_stats = DeviceData()
-            old_stats.parse_stats(old[device])
-            diff_stats = stats.compare_iostats(old_stats)
-            diff_stats.display_iostats(time)
+            if ("fstype autofs" not in str(old[device])) and ("fstype autofs" not in str(new[device])):
+                old_stats = DeviceData()
+                old_stats.parse_stats(old[device])
+                diff_stats = stats.compare_iostats(old_stats)
+                diff_stats.display_iostats(time)
 
 def iostat_command(args):
     """iostat-like command for NFS mount points
diff -up nfs-utils-2.5.1/tools/nfs-iostat/nfs-iostat.py.orig nfs-utils-2.5.1/tools/nfs-iostat/nfs-iostat.py
--- nfs-utils-2.5.1/tools/nfs-iostat/nfs-iostat.py.orig	2020-09-08 10:59:58.286384653 -0400
+++ nfs-utils-2.5.1/tools/nfs-iostat/nfs-iostat.py	2020-09-08 14:02:05.560514346 -0400
@@ -470,10 +470,13 @@ def parse_stats_file(filename):
 def print_iostat_summary(old, new, devices, time, options):
     stats = {}
     diff_stats = {}
+    devicelist = []
     if old:
         # Trim device list to only include intersection of old and new data,
         # this addresses umounts due to autofs mountpoints
-        devicelist = [x for x in old if x in devices]
+        for device in devices:
+            if "fstype autofs" not in str(old[device]):
+                devicelist.append(device)
     else:
         devicelist = devices