diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bb634d..d4805e1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -133,6 +133,7 @@ else()
 		LINK_OPTIONS "/guard:cf"
 		INTERPROCEDURAL_OPTIMIZATION YES
 	)
+	set_property(SOURCE ScheduledUpdateTask.cpp APPEND PROPERTY COMPILE_OPTIONS "/Zc:wchar_t-") # required for task scheduler BSTR type
 	target_link_libraries( ${PROGNAME} Qt5::Widgets Qt5::Network qtsingleapplication OpenSSL::Crypto
 		msi Mstask Userenv wintrust Crypt32 taskschd comsupp ws2_32 Setupapi winscard Wtsapi32
 	)