diff --git a/libc/tools/check-symbols-glibc.py b/libc/tools/check-symbols-glibc.py
index 7ede2e6..7657925 100755
--- a/libc/tools/check-symbols-glibc.py
+++ b/libc/tools/check-symbols-glibc.py
@@ -209,6 +209,8 @@
   'mq_timedreceive', # disallowed by SELinux
   'mq_timedsend', # disallowed by SELinux
   'mq_unlink', # disallowed by SELinux
+  'pthread_getconcurrency', # marked obsolescent
+  'pthread_setconcurrency', # marked obsolescent
   'putmsg', # obsolete
   'putpmsg', # obsolete
   'pututxline', # no utmp on Android