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-rw-r--r--zlib/zconf.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/zlib/zconf.h b/zlib/zconf.h
index f786a20a6f9..d983fa3eed4 100644
--- a/zlib/zconf.h
+++ b/zlib/zconf.h
@@ -288,7 +288,7 @@ typedef uLong FAR uLongf;
typedef Byte *voidp;
#endif
-#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */
+#ifdef HAVE_UNISTD_H
# include <sys/types.h> /* for off_t */
# include <unistd.h> /* for SEEK_* and off_t */
# ifdef VMS