diff --git a/snapraid.txt b/snapraid.txt
index 9b29a622..370bea59 100644
--- a/snapraid.txt
+++ b/snapraid.txt
@@ -7,7 +7,7 @@
 ==========
 
 snapraid [-c, --conf CONFIG]
-	[-f, --filter PATTERN] [-d, --filter-disk NAME]
+	[-f, --filter PATTERN] [-d, --filter-disk NAME] [-m, --filter-missing]
 	[-a, --audit-only]
 	[-N, --find-by-name]
 	[-Z, --force-zero] [-E, --force-empty]
@@ -193,13 +193,18 @@ in "sync".
 
 In this regard SnapRAID is more like a backup program than a RAID
 system. For example, you can use it to recover from an accidentally
-deleted directory, simply running the fix command like.
+deleted directory, simply running the fix command using the
+-m, --filter-missing filter, like:
 
-    snapraid fix -f DIR/
+    snapraid fix -m -f DIR/
 
 Or to simply recover one file you can use:
 
-    snapraid fix -f FILE
+    snapraid fix -m -f FILE
+
+Or to recover all the delete files with:
+
+    snapraid fix -m
 
 
 5 COMMANDS
@@ -322,13 +327,24 @@ SnapRAID provides the following options:
         file.
         In "check", you can make it faster, specifing also -a, --audit-only
         option, to avoid to access other disks to check parity data.
-        If you combine --filter and --filter-disk options, only files
-        matching both the two groups of rules are selected.
+        If you combine more --filter, --filter-disk and --filter-missing options,
+        only files matching all the set of filters are selected.
         This option can be used many times.
         This option can be used only with the "check" and "fix" commands.
         Note that it cannot be used with "sync", because "sync" always
         process the whole array.
 
+    -n, --fileter-missing
+        Filters the files to process in the "check" and "fix"
+        commands.
+        Only the files missing/deleted from the array are processed.
+        When used with "fix", this is a kind of "undelete" command.
+        If you combine more --filter, --filter-disk and --filter-missing options,
+        only files matching all the set of filters are selected.
+        This option can be used only with the "check" and "fix" commands.
+        Note that it cannot be used with "sync", because "sync" always
+        process the whole array.
+
     -a, --audit-only
         When checking, only verify the hash of the files, without
         doing any kind of check on the redundancy data.