diff --git a/libc/include/sys/linux-syscalls.h b/libc/include/sys/linux-syscalls.h
index 5d2b55e..c4e6e45 100644
--- a/libc/include/sys/linux-syscalls.h
+++ b/libc/include/sys/linux-syscalls.h
@@ -170,6 +170,8 @@
 #define __NR_getsockopt                   (__NR_SYSCALL_BASE + 295)
 #define __NR_sendmsg                      (__NR_SYSCALL_BASE + 296)
 #define __NR_recvmsg                      (__NR_SYSCALL_BASE + 297)
+#define __NR_ioprio_set                   (__NR_SYSCALL_BASE + 314)
+#define __NR_ioprio_get                   (__NR_SYSCALL_BASE + 315)
 #define __NR_epoll_create                 (__NR_SYSCALL_BASE + 250)
 #define __NR_epoll_ctl                    (__NR_SYSCALL_BASE + 251)
 #define __NR_epoll_wait                   (__NR_SYSCALL_BASE + 252)
@@ -210,6 +212,8 @@
 #define __NR_timer_delete                 (__NR_SYSCALL_BASE + 263)
 #define __NR_utimes                       (__NR_SYSCALL_BASE + 271)
 #define __NR_socketcall                   (__NR_SYSCALL_BASE + 102)
+#define __NR_ioprio_set                   (__NR_SYSCALL_BASE + 289)
+#define __NR_ioprio_get                   (__NR_SYSCALL_BASE + 290)
 #define __NR_epoll_create                 (__NR_SYSCALL_BASE + 254)
 #define __NR_epoll_ctl                    (__NR_SYSCALL_BASE + 255)
 #define __NR_epoll_wait                   (__NR_SYSCALL_BASE + 256)
@@ -264,6 +268,8 @@
 #define __NR_socketcall                   (__NR_SYSCALL_BASE + 102)
 #define __NR_socketcall                   (__NR_SYSCALL_BASE + 102)
 #define __NR___socketcall                 (__NR_SYSCALL_BASE + 102)
+#define __NR_ioprio_set                   (__NR_SYSCALL_BASE + 289)
+#define __NR_ioprio_get                   (__NR_SYSCALL_BASE + 290)
 #define __NR_epoll_create                 (__NR_SYSCALL_BASE + 254)
 #define __NR_epoll_ctl                    (__NR_SYSCALL_BASE + 255)
 #define __NR_epoll_wait                   (__NR_SYSCALL_BASE + 256)
diff --git a/libc/include/sys/linux-unistd.h b/libc/include/sys/linux-unistd.h
index 9a151d2..f48dbcd 100644
--- a/libc/include/sys/linux-unistd.h
+++ b/libc/include/sys/linux-unistd.h
@@ -180,6 +180,8 @@
 int              sched_get_priority_max (int policy);
 int              sched_get_priority_min (int policy);
 int              sched_rr_get_interval (pid_t pid, struct timespec *interval);
+int              ioprio_set (int which, int who, int ioprio);
+int              ioprio_get (int which, int who);
 int              uname (struct utsname *);
 pid_t            __wait4 (pid_t pid, int *status, int options, struct rusage *rusage);
 mode_t           umask (mode_t);