From 2db26ff5224288df83333e5149217ba947581348 Mon Sep 17 00:00:00 2001
From: Pavel Sanda <sanda@lyx.org>
Date: Mon, 14 Dec 2020 00:01:05 +0100
Subject: [PATCH] Compile on older gcc.

---
 src/support/FileMonitor.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/support/FileMonitor.h b/src/support/FileMonitor.h
index 07a8dc532c..622637efa4 100644
--- a/src/support/FileMonitor.h
+++ b/src/support/FileMonitor.h
@@ -20,6 +20,7 @@
 #include "support/signals.h"
 
 #include <memory>
+#include <map>
 
 #include <QFileSystemWatcher>
 #include <QObject>