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-rw-r--r--perform/pio_engine.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/perform/pio_engine.c b/perform/pio_engine.c
index 27606d0..129addf 100644
--- a/perform/pio_engine.c
+++ b/perform/pio_engine.c
@@ -22,7 +22,9 @@
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
+#ifdef H5_HAVE_UNISTD_H
#include <unistd.h>
+#endif
#include <errno.h>
#include "hdf5.h"