diff --git a/libc/kernel/uapi/linux/atm.h b/libc/kernel/uapi/linux/atm.h
index 488fa05..72d329d 100644
--- a/libc/kernel/uapi/linux/atm.h
+++ b/libc/kernel/uapi/linux/atm.h
@@ -140,7 +140,7 @@
 struct atmif_sioc {
   int number;
   int length;
-  void __user * arg;
+  void  * arg;
 };
 typedef unsigned short atm_backend_t;
 #endif