diff --git a/lib/openat2.cc b/lib/openat2.cc
index d868234..5b76bb0 100644
--- a/lib/openat2.cc
+++ b/lib/openat2.cc
@@ -4,9 +4,7 @@
 
 // Compatibility for building on old libc for new kernel
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0)
-
-// Every arch that defines this uses 437, except Alpha, where 437 is
+// Every arch that defines this (so far) uses 437, except Alpha, where 437 is
 // mq_getsetattr.
 
 #ifndef SYS_openat2
@@ -17,8 +15,6 @@
 #endif
 #endif
 
-#endif // Linux version >= v5.6
-
 #include <fcntl.h>
 #include <unistd.h>
 
@@ -29,12 +25,7 @@ __attribute__((weak))
 openat2(int const dirfd, const char *const pathname, struct open_how *const how, size_t const size)
 throw()
 {
-#ifdef SYS_openat2
 	return syscall(SYS_openat2, dirfd, pathname, how, size);
-#else
-	errno = ENOSYS;
-	return -1;
-#endif
 }
 
 };