diff --git a/common/utils/T/tracer/record.c b/common/utils/T/tracer/record.c
index c81b93e7d7..b1a1bc60de 100644
--- a/common/utils/T/tracer/record.c
+++ b/common/utils/T/tracer/record.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <signal.h>
 #include <string.h>
+#include <unistd.h>
 #include "database.h"
 #include "utils.h"
 #include "../T_defs.h"