1 files changed, 1 insertions, 0 deletions
diff --git a/exp_clib.c b/exp_clib.c
index 172c05e..af41841 100644
--- a/exp_clib.c
+++ b/exp_clib.c
@@ -9,6 +9,7 @@ would appreciate credit if this program or parts of it are used.
 
 #include "expect_cf.h"
 #include <stdio.h>
+#include <unistd.h>
 #include <setjmp.h>
 #ifdef HAVE_INTTYPES_H
 #  include <inttypes.h>