--- src/membergroup.cpp.orig	2021-08-02 18:54:15 UTC
+++ src/membergroup.cpp
@@ -27,6 +27,7 @@
 #include "doxygen.h"
 #include "docparser.h"
 #include "entry.h"
+#include <sys/types.h>
 #include "md5.h"
 
 MemberGroup::MemberGroup(const Definition *container,int id,const QCString &hdr,
