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diff --git a/UPGRADE.txt b/UPGRADE.txt
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+++ b/UPGRADE.txt
@@ -71,6 +71,11 @@ Applications:
* DISA()'s fifth argument is now an options argument. If you have previously
used 'NOANSWER' in this argument, you'll need to convert that to the new
option 'n'.
+* Macro() is now deprecated. If you need subroutines, you should use the
+ Gosub()/Return() applications. To replace MacroExclusive(), we have
+ introduced dialplan functions LOCK(), TRYLOCK(), and UNLOCK(). You may use
+ these functions in any location where you desire to ensure that only one
+ channel is executing that path at any one time.
CDR: