diff --git a/libcxx/lib/abi/CHANGELOG.TXT b/libcxx/lib/abi/CHANGELOG.TXT
--- a/libcxx/lib/abi/CHANGELOG.TXT
+++ b/libcxx/lib/abi/CHANGELOG.TXT
@@ -16,7 +16,7 @@
 Version 10.0
 ------------
 
-* TODO - [libc++] Implementation of C++20's P1135R6 for libcxx
+* 54fa9ecd3088 - [libc++] Implementation of C++20's P1135R6 for libcxx
 
   libc++ now implements P1135R6 (The C++20 Synchronization Library), which
   adds a few symbols to the dylib. This is backwards-compatible since we're