diff --git a/libc/include/sys/user.h b/libc/include/sys/user.h
index 21803d8c6..18684f183 100644
--- a/libc/include/sys/user.h
+++ b/libc/include/sys/user.h
@@ -103,7 +103,7 @@ struct user {
 struct user_fpregs_struct {
   unsigned short cwd;
   unsigned short swd;
-  unsigned short twd;
+  unsigned short ftw;
   unsigned short fop;
   __u64 rip;
   __u64 rdp;