From ea49e40b7825337fbbad2c2dbd4b0ffd8ad0e0f7 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 17 Aug 2019 17:12:42 +0200
Subject: [PATCH] fix msvc build failure

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

diff --git a/src/Gui/Document.cpp b/src/Gui/Document.cpp
index f883b80ab6..42c6812944 100644
--- a/src/Gui/Document.cpp
+++ b/src/Gui/Document.cpp
@@ -38,6 +38,8 @@
 # include <Inventor/nodes/SoSeparator.h>
 #endif
 
+#include <cctype>
+
 #include <Base/Console.h>
 #include <Base/Exception.h>
 #include <Base/Matrix.h>