Fix build error on VS2017

WinMerge · Oct 7, 2023 · 112c6fb · 112c6fb
1 parent f9a3d5e
commit 112c6fb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Src/pch.h b/Src/pch.h
@@ -14,4 +14,5 @@
 #include <functional>
 #include <cassert>
 #include <ctime>
+#include <cctype>
 #include <boost/flyweight.hpp>