diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index e530293..0c59c92 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -232,7 +232,7 @@
 int     __rt_sigpending:rt_sigpending(sigset_t*, size_t)  all
 int     __rt_sigprocmask:rt_sigprocmask(int, const sigset_t*, sigset_t*, size_t)  all
 int     __rt_sigsuspend:rt_sigsuspend(const sigset_t*, size_t)  all
-int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t*, struct siginfo_t*, struct timespec_t*, size_t)  all
+int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t*, siginfo_t*, const timespec*, size_t)  all
 int     ___rt_sigqueueinfo:rt_sigqueueinfo(pid_t, int, siginfo_t*)  all
 int     __signalfd4:signalfd4(int, const sigset_t*, size_t, int)  all
 
diff --git a/libc/bionic/posix_timers.cpp b/libc/bionic/posix_timers.cpp
index c8f71c8..c46965f 100644
--- a/libc/bionic/posix_timers.cpp
+++ b/libc/bionic/posix_timers.cpp
@@ -37,7 +37,7 @@
 #include <time.h>
 
 // System calls.
-extern "C" int __rt_sigtimedwait(const sigset_t*, siginfo_t*, const struct timespec*, size_t);
+extern "C" int __rt_sigtimedwait(const sigset_t*, siginfo_t*, const timespec*, size_t);
 extern "C" int __timer_create(clockid_t, sigevent*, __kernel_timer_t*);
 extern "C" int __timer_delete(__kernel_timer_t);
 extern "C" int __timer_getoverrun(__kernel_timer_t);
diff --git a/libc/bionic/sigwait.cpp b/libc/bionic/sigwait.cpp
index 873a368..2534b89 100644
--- a/libc/bionic/sigwait.cpp
+++ b/libc/bionic/sigwait.cpp
@@ -33,7 +33,7 @@
 
 #include "private/kernel_sigset_t.h"
 
-extern "C" int __rt_sigtimedwait(const sigset_t* uthese, siginfo_t* uinfo, const struct timespec* uts, size_t sigsetsize);
+extern "C" int __rt_sigtimedwait(const sigset_t*, siginfo_t*, const timespec*, size_t);
 
 int sigwait(const sigset_t* set, int* sig) {
   kernel_sigset_t sigset(set);