diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index 7c8f38c..f59cfab 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -55,6 +55,9 @@
 - fix sem_trywait() to return -1 and set errno to EAGAIN, instead of
   returning EAGAIN directly.
 
+- fix sem_post() to wake up multiple threads when called rapidly in
+  succession.
+
 -------------------------------------------------------------------------------
 Differences between Android 2.1 and 2.0.1: