diff --git a/userspace/libraries/LibC/include/sys/weak_alias.h b/userspace/libraries/LibC/include/sys/weak_alias.h
new file mode 100644
index 00000000..46d747ec
--- /dev/null
+++ b/userspace/libraries/LibC/include/sys/weak_alias.h
@@ -0,0 +1,7 @@
+#ifndef _SYS_WEAK_ALIAS
+#define _SYS_WEAK_ALIAS 1
+
+#define weak_alias(name, aliasname) _weak_alias (name, aliasname)
+#define _weak_alias(name, aliasname) extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)))
+
+#endif