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-rw-r--r--perlsfio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/perlsfio.h b/perlsfio.h
index a736371a32..22f5427f8c 100644
--- a/perlsfio.h
+++ b/perlsfio.h
@@ -35,7 +35,7 @@ extern int _stdprintf _ARG_((const char*, ...));
#define PerlIO_fileno(f) sffileno(f)
#define PerlIO_clearerr(f) sfclrerr(f)
#define PerlIO_flush(f) sfsync(f)
-#define PerlIO_tell(f) sftell(f)
+#define PerlIO_tell(f) sfseek(f,0,1|SF_SHARE)
#define PerlIO_seek(f,o,w) sfseek(f,o,w)
#define PerlIO_rewind(f) (void) sfseek((f),0L,0)
#define PerlIO_tmpfile() sftmp(0)