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-rw-r--r--posix/unistd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index 1555f07317..135f0633b5 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -887,6 +887,7 @@ extern int truncate64 __P ((__const char *__file, __off64_t __length));
#endif
/* Truncate the file FD is open on to LENGTH bytes. */
+extern int __ftruncate __P ((int __fd, __off_t __length));
#ifndef __USE_FILE_OFFSET64
extern int ftruncate __P ((int __fd, __off_t __length));
#else