diff --git a/decrepit/CMakeLists.txt b/decrepit/CMakeLists.txt
index ef95a6b..0b52c05 100644
--- a/decrepit/CMakeLists.txt
+++ b/decrepit/CMakeLists.txt
@@ -40,6 +40,10 @@ add_executable(
 
 add_dependencies(decrepit_test global_target)
 
+if(MSVC)
+  target_compile_options(decrepit PRIVATE /wd4065)
+endif()
+
 target_link_libraries(decrepit_test test_support_lib boringssl_gtest decrepit
                       crypto)
 if(WIN32)