diff --git a/README.md b/README.md
index 017a6448..884f0e65 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ Headers:
  - [SQL Server Name Convention and T-SQL Programming Style](/SQL Server Name Convention and T-SQL Programming Style.md)
  - [SQL Server Licensing](/SQL Server Licensing.md)
  - [SQL Server People](/SQL Server People.md 'Most Valuable SQL Server professionals')
- - [SQL Server Trace Flag](/SQL Server Trace Flag.md 'Complete list - 313 Trace Flags') (Complete list - **313** trace flags)
+ - [SQL Server Trace Flag](/SQL Server Trace Flag.md 'Complete list - 314 Trace Flags') (Complete list - **314** trace flags)
  - [SQL Server Version](/SQL Server Version.md 'List of all Microsoft SQL Sever versions') (**Complete list - from SQL Server 1.0 to SQL Server 2016**)
  - [Articles](/Articles)
  - [CLR procedures](/CLR)
diff --git a/SQL Server Trace Flag.md b/SQL Server Trace Flag.md
index b5dec12d..8cc0b093 100644
--- a/SQL Server Trace Flag.md	
+++ b/SQL Server Trace Flag.md	
@@ -1,5 +1,5 @@
 # Microsoft SQL Server Trace Flags
-Complete list of Microsoft SQL Server trace flags (313 trace flags)
+Complete list of Microsoft SQL Server trace flags (314 trace flags)
 
 **REMEMBER: Be extremely careful with trace flags, test in your test environment first. And consult professionals first if you are the slightest uncertain about the effects of your changes.**
 
@@ -108,7 +108,7 @@ GO
 
 
 ## Trace flags list <a id="trace-flags-list"></a>
-Summary: **313 trace flags**
+Summary: **314 trace flags**
 
 
 **Trace Flag: -1**<br />
@@ -1816,6 +1816,14 @@ Function: Activate the trace flag before creating a natively compiled procedure.
 Link: https://web.archive.org/web/20160327221828/http://speedysql.com/2015/10/28/new-trace-flag-for-in-memory-oltp-hekaton/
 
 
+**Trace Flag: 9851**<br />
+**Undocumented trace flag**<br />
+Function: For testing purposes, you might want to turn off automatic merging of files, so that you can more readily
+explore this metadata. You can do that by turning on the undocumented trace flag 9851. And of course,
+be sure to turn off the trace flag when done testing.<br/>
+Link: http://gsl.azurewebsites.net/Portals/0/Users/dewitt/talks/HekatonWhitePaper.pdf
+
+
 **Trace Flag: 10204**<br />
 Function: Disables merge/recompress during columnstore index reorganization.
 In SQL Server 2016, when a columnstore index is reorganized, there is new functionality to automatically merge any small compressed rowgroups into larger compressed rowgroups, as well as recompressing any rowgroups that have a large number of deleted rows.