diff --git a/source/reference/command/collMod.txt b/source/reference/command/collMod.txt
index 4ecce0c7301..1ed63ac94dd 100644
--- a/source/reference/command/collMod.txt
+++ b/source/reference/command/collMod.txt
@@ -29,12 +29,14 @@ collMod
       The :collflag:`usePowerOf2Sizes` flag changes the method that
       MongoDB uses to allocate space on disk for documents in this
       collection. By setting :collflag:`usePowerOf2Sizes`, you ensure
-      that MongoDB will allocates space for documents in sizes that
-      are powers of 2 (e.g. 4, 8, 16, 32, 64, 128, 512...) With this
-      option MongoDB will be able to more effectively reuse space.
+      that MongoDB will allocate space for documents in sizes that
+      are powers of 2 (e.g. 4, 8, 16, 32, 64, 128, 256, 512...8388608).
+      With this option MongoDB will be able to more effectively reuse 
+      space.
 
       :collflag:`usePowerOf2Sizes` is useful for collections where you
       will be inserting and deleting large numbers of documents to
       ensure that MongoDB will effectively use space on disk.
 
    .. include:: /includes/warning-blocking-database.rst
+   
\ No newline at end of file