diff --git a/arch/x86_64/bits/user.h b/arch/x86_64/bits/user.h
index 13ff027b..ca2dae83 100644
--- a/arch/x86_64/bits/user.h
+++ b/arch/x86_64/bits/user.h
@@ -1,5 +1,5 @@
 #undef __WORDSIZE
-#define __WORDSIZE 32
+#define __WORDSIZE 64
 
 struct user_fpregs_struct
 {