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-rw-r--r--m_option.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/m_option.c b/m_option.c
index dda0cfba37..75645c15ee 100644
--- a/m_option.c
+++ b/m_option.c
@@ -9,6 +9,7 @@
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
+#include <unistd.h>
#include "m_option.h"
//#include "m_config.h"