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-rw-r--r--zlib/zconf.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/zlib/zconf.h b/zlib/zconf.h
index 96dbc205c91..e63803b2d76 100644
--- a/zlib/zconf.h
+++ b/zlib/zconf.h
@@ -328,4 +328,12 @@ typedef uLong FAR uLongf;
#endif
#endif
+/* Tru64 UNIX V4.0 neither */
+#if defined(__alpha) && defined(__osf__)
+#include <unistd.h>
+#if _XOPEN_VERSION < 500
+#define NO_vsnprintf
+#endif
+#endif
+
#endif /* ZCONF_H */