diff --git a/webrtc_controller_flutter/windows/CMakeLists.txt b/webrtc_controller_flutter/windows/CMakeLists.txt
index 043c0f5..8972094 100644
--- a/webrtc_controller_flutter/windows/CMakeLists.txt
+++ b/webrtc_controller_flutter/windows/CMakeLists.txt
@@ -39,7 +39,7 @@ add_definitions(-DUNICODE -D_UNICODE)
 # of modifying this function.
 function(APPLY_STANDARD_SETTINGS TARGET)
   target_compile_features(${TARGET} PUBLIC cxx_std_17)
-  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
+  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100" /utf-8)
   target_compile_options(${TARGET} PRIVATE /EHsc)
   target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
   target_compile_definitions(${TARGET} PRIVATE "$<$<CONFIG:Debug>:_DEBUG>")