diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index 4f87547..2e3ba62 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -80,6 +80,16 @@
   an unknown domain name. Due to an initialization bug, a random DNS search
   list was generated for each thread is net.dns.search is not defined.
 
+- <pthread.h>: Add pthread_condattr_init/destroy/setpshared/getpshared.
+  Also modify mutex and condvar implementation to use private futexes by
+  default, unless PROCESS_SHARED is specified in the init attributes.
+
+  Private futexes are limited to a single address space and can't be shared
+  among processes. However they are much faster to wake/wait for. This should
+  speed up mutex and condvar operations.
+
+  NOTE: PROCESS_SHARED mutexes are still NOT robust (see note below).
+
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 Differences between Android 2.1 and 2.0.1: