diff --git a/libc/docs/CHANGES.TXT b/libc/docs/CHANGES.TXT
index ee4c34c..c8bdb6f 100644
--- a/libc/docs/CHANGES.TXT
+++ b/libc/docs/CHANGES.TXT
@@ -8,6 +8,8 @@
 - <semaphore.h>: Use private futexes for semaphore implementation,
   unless your set 'pshared' to non-0 when calling sem_init().
 
+- <math.h>: Added sincos(), sincosf() and sincosl() (GLibc compatibility).
+
 - <sys/sysinfo.h>: Added missing sysinfo() system call implementation
   (the function was already declared in the header though).