diff --git a/libc/kernel/uapi/linux/nfs4.h b/libc/kernel/uapi/linux/nfs4.h
index 09a3c7c..2944693 100644
--- a/libc/kernel/uapi/linux/nfs4.h
+++ b/libc/kernel/uapi/linux/nfs4.h
@@ -157,7 +157,7 @@
 #define NFS4_SECINFO_STYLE4_CURRENT_FH 0
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define NFS4_SECINFO_STYLE4_PARENT 1
-#define NFS4_MAX_UINT64 (~(u64)0)
+#define NFS4_MAX_UINT64 (~(__u64)0)
 #define NFS4_MAX_OPS 8
 #define NFS4_MAX_BACK_CHANNEL_OPS 2
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */