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-rw-r--r--include/unistd.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h
index a171b00326..a043431ecf 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -6,6 +6,8 @@
 libc_hidden_proto (_exit, __noreturn__)
 rtld_hidden_proto (_exit, __noreturn__)
 libc_hidden_proto (alarm)
+extern size_t __confstr (int name, char *buf, size_t len);
+libc_hidden_proto (__confstr)
 libc_hidden_proto (confstr)
 libc_hidden_proto (execl)
 libc_hidden_proto (execle)