diff --git a/scripts/lib/wic/help.py b/scripts/lib/wic/help.py
index 89fb7be950..be334e7814 100644
--- a/scripts/lib/wic/help.py
+++ b/scripts/lib/wic/help.py
@@ -617,7 +617,7 @@ DESCRIPTION
        This command creates a partition on the system and uses the
        following syntax:
 
-         part <mountpoint>
+         part [<mountpoint>]
 
        The <mountpoint> is where the partition will be mounted and
        must take of one of the following forms:
@@ -626,6 +626,9 @@ DESCRIPTION
 
          swap: The partition will be used as swap space.
 
+       If a <mountpoint> is not specified the partition will be created
+       but will not be mounted.
+
        The following are supported 'part' options:
 
          --size: The minimum partition size. Specify an integer value