diff --git a/sysdeps/unix/alpha/Makefile b/sysdeps/unix/alpha/Makefile
new file mode 100644
index 0000000000..441aa02a83
--- /dev/null
+++ b/sysdeps/unix/alpha/Makefile
@@ -0,0 +1,3 @@
+ifeq ($(subdir),rt)
+librt-sysdep_routines += rt-sysdep
+endif