diff --git a/include/syscall-x86-64.def b/include/syscall-x86-64.def
index be0ed637f..cf1903ac9 100644
--- a/include/syscall-x86-64.def
+++ b/include/syscall-x86-64.def
@@ -44,6 +44,7 @@ __NR_mkdir		83		sys_mkdir		(const char *name, int mode)
 __NR_rmdir		84		sys_rmdir		(const char *name)
 __NR_unlink		87		sys_unlink		(char *pathname)
 __NR_readlink		89		sys_readlink		(const char *path, char *buf, int bufsize)
+__NR_getgroups		115		sys_getgroups		(int gsize, unsigned int *groups)
 __NR_setresuid		117		sys_setresuid		(int uid, int euid, int suid)
 __NR_setresgid		119		sys_setresgid		(int gid, int egid, int sgid)
 __NR_getpgid		121		sys_getpgid		(void)