diff --git a/CMakeLists.txt b/CMakeLists.txt
index 79c66c3..f6639d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,6 +127,10 @@ if (UNIX AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES FreeBSD)
     #this only gets applied to aws-c-common (not its consumers).
     target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=500)
 endif()
+ 
+if (WIN32)
+    add_compile_options(/wd4068)
+endif()
 
 aws_add_sanitizers(${CMAKE_PROJECT_NAME} BLACKLIST "sanitizer-blacklist.txt")
 target_link_libraries(${CMAKE_PROJECT_NAME} PUBLIC ${PLATFORM_LIBS})