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-rw-r--r--lib/ftruncate.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ftruncate.c b/lib/ftruncate.c
index 4f6aaa993..58cd2bba9 100644
--- a/lib/ftruncate.c
+++ b/lib/ftruncate.c
@@ -32,7 +32,9 @@ ftruncate (fd, length)
#include <sys/stat.h>
#include <errno.h>
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
+#endif
int
ftruncate (fd, length)