diff --git a/mbuni/extras/pgsql-queue/mms_pgsql_queue.c b/mbuni/extras/pgsql-queue/mms_pgsql_queue.c
index 8eaff33..fe10b77 100644
--- a/mbuni/extras/pgsql-queue/mms_pgsql_queue.c
+++ b/mbuni/extras/pgsql-queue/mms_pgsql_queue.c
@@ -1,5 +1,7 @@
-#include <libpq-fe.h>
+#include <unistd.h>
+#include <stdlib.h>
 #include <ctype.h>
+#include <libpq-fe.h>
 #include "mms_queue.h"
 
 /*