From 92505fb8ea36410d9864a678e5e5486dce4028df Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Mon, 28 Feb 2022 12:37:09 +0100
Subject: [PATCH] Gui: [skip ci] std::isspace requires cctype header

---
 src/Gui/Document.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Gui/Document.cpp b/src/Gui/Document.cpp
index 8e1d4bba78..6233922d33 100644
--- a/src/Gui/Document.cpp
+++ b/src/Gui/Document.cpp
@@ -32,6 +32,8 @@
 # include <Inventor/nodes/SoSeparator.h>
 #endif
 
+#include <cctype>
+
 #include <App/AutoTransaction.h>
 #include <App/DocumentObject.h>
 #include <App/DocumentObjectGroup.h>