diff --git a/tools/elf2uf2/CMakeLists.txt b/tools/elf2uf2/CMakeLists.txt
index 070e114..fb5625f 100644
--- a/tools/elf2uf2/CMakeLists.txt
+++ b/tools/elf2uf2/CMakeLists.txt
@@ -6,4 +6,7 @@ set(CMAKE_CXX_STANDARD 14)
 add_subdirectory(../../src/common/boot_uf2 boot_uf2_headers)
 
 add_executable(elf2uf2 main.cpp)
+if (WIN32 AND NOT MINGW AND (CMAKE_CXX_COMPILER_ID STREQUAL "Clang"))
+    target_compile_definitions(elf2uf2 PRIVATE _CRT_SECURE_NO_WARNINGS)
+endif()
 target_link_libraries(elf2uf2 boot_uf2_headers)
\ No newline at end of file