diff --git a/build.pri b/build.pri
index d8256c3f0..1ef8dcf67 100644
--- a/build.pri
+++ b/build.pri
@@ -101,7 +101,7 @@ win32-msvc*:DEFINES *= _SCL_SECURE_NO_WARNINGS
 # win32-g++: QMAKE_CXXFLAGS +=  $$join(QMAKE_INCDIR_QT, " -isystem", "-isystem")
 
 # swift standard warnings
-win32-msvc*:QMAKE_CXXFLAGS_WARN_ON *= /wd4351
+win32-msvc*:QMAKE_CXXFLAGS_WARN_ON *= /wd4351 /wd4661
 
 # elevated warnings
 # win32-msvc*:QMAKE_CXXFLAGS_WARN_ON *= /Wall /wd4640 /wd4619 /wd4350 /wd4351 /wd4946 /wd4510 /wd4820 /wd4571 /wd4625 /wd4626 /wd4127