diff --git a/docs/mfc/codesnippet/CPP/clistbox-class_23.cpp b/docs/mfc/codesnippet/CPP/clistbox-class_23.cpp
index ef804e6707e..4b00182aa22 100644
--- a/docs/mfc/codesnippet/CPP/clistbox-class_23.cpp
+++ b/docs/mfc/codesnippet/CPP/clistbox-class_23.cpp
@@ -1,6 +1,6 @@
    // Initialize the storage of the list box to be 256 strings with
    // about 10 characters per string, performance improvement.
-   int n = m_myListBox.InitStorage(256, 10);
+   int n = m_myListBox.InitStorage(256, 16*sizeof(TCHAR));
    ASSERT(n != LB_ERRSPACE);
 
    // Add 256 items to the list box.
@@ -9,4 +9,4 @@
    {
       str.Format(_T("item string %d"), i);
       m_myListBox.AddString( str );
-   }
\ No newline at end of file
+   }