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-rw-r--r--libc/sysdeps/linux/x86_64/sys/perm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/x86_64/sys/perm.h b/libc/sysdeps/linux/x86_64/sys/perm.h
index 382fa92ee..37964552c 100644
--- a/libc/sysdeps/linux/x86_64/sys/perm.h
+++ b/libc/sysdeps/linux/x86_64/sys/perm.h
@@ -26,6 +26,7 @@ __BEGIN_DECLS
/* Set port input/output permissions. */
extern int ioperm (unsigned long int __from, unsigned long int __num,
int __turn_on) __THROW;
+libc_hidden_proto(ioperm)
/* Change I/O privilege level. */