diff --git a/quill/CMakeLists.txt b/quill/CMakeLists.txt
index 76872c2..c173804 100644
--- a/quill/CMakeLists.txt
+++ b/quill/CMakeLists.txt
@@ -148,6 +148,10 @@ if (QUILL_NO_EXCEPTIONS)
     endif ()
 endif ()
 
+if (MSVC)
+    add_definitions(/wd4189)
+endif()
+
 # Add target sources
 target_sources(${TARGET_NAME} PRIVATE ${SOURCE_FILES} ${HEADER_FILES})