diff --git a/libc/include/sys/linux-syscalls.h b/libc/include/sys/linux-syscalls.h
index 6e373e0..9fefd86 100644
--- a/libc/include/sys/linux-syscalls.h
+++ b/libc/include/sys/linux-syscalls.h
@@ -181,6 +181,7 @@
 #define __NR_inotify_rm_watch             (__NR_SYSCALL_BASE + 318)
 #define __NR_ARM_set_tls                  (__NR_SYSCALL_BASE + 983045)
 #define __NR_ARM_cacheflush               (__NR_SYSCALL_BASE + 983042)
+#define __NR_eventfd                      (__NR_SYSCALL_BASE + 351)
 #endif
 
 #ifdef __i386__
@@ -222,6 +223,7 @@
 #define __NR_inotify_init                 (__NR_SYSCALL_BASE + 291)
 #define __NR_inotify_add_watch            (__NR_SYSCALL_BASE + 292)
 #define __NR_inotify_rm_watch             (__NR_SYSCALL_BASE + 293)
+#define __NR_eventfd                      (__NR_SYSCALL_BASE + 323)
 #endif
 
 #if defined(__SH3__) || defined(__SH4__) 
@@ -279,6 +281,7 @@
 #define __NR_inotify_init                 (__NR_SYSCALL_BASE + 290)
 #define __NR_inotify_add_watch            (__NR_SYSCALL_BASE + 291)
 #define __NR_inotify_rm_watch             (__NR_SYSCALL_BASE + 292)
+#define __NR_eventfd                      (__NR_SYSCALL_BASE + 323)
 #endif
 
 #endif