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-rw-r--r--camlibs/mustek/io.c1
-rw-r--r--camlibs/mustek/rs232.c1
-rw-r--r--camlibs/mustek/usb.c1
3 files changed, 3 insertions, 0 deletions
diff --git a/camlibs/mustek/io.c b/camlibs/mustek/io.c
index 55ad4b9bc..dbff9dfd4 100644
--- a/camlibs/mustek/io.c
+++ b/camlibs/mustek/io.c
@@ -35,6 +35,7 @@
#include "io.h"
#include <string.h>
#include <sys/time.h>
+#include <unistd.h>
#include "print.h"
#include "rs232.h"
#include "usb.h"
diff --git a/camlibs/mustek/rs232.c b/camlibs/mustek/rs232.c
index a4ce4866a..5fedcf2ba 100644
--- a/camlibs/mustek/rs232.c
+++ b/camlibs/mustek/rs232.c
@@ -31,6 +31,7 @@
#include <fcntl.h>
#include <sys/time.h>
+#include <unistd.h>
/*
diff --git a/camlibs/mustek/usb.c b/camlibs/mustek/usb.c
index ab7d95411..59a4f3459 100644
--- a/camlibs/mustek/usb.c
+++ b/camlibs/mustek/usb.c
@@ -38,6 +38,7 @@
#include <fcntl.h>
#include <sys/time.h>
+#include <unistd.h>
/*