diff --git a/libcxx/include/__configuration/platform.h b/libcxx/include/__configuration/platform.h
index f3c199dee172b..4a414d00e2208 100644
--- a/libcxx/include/__configuration/platform.h
+++ b/libcxx/include/__configuration/platform.h
@@ -20,7 +20,7 @@
 #  define _LIBCPP_OBJECT_FORMAT_ELF 1
 #elif defined(__MACH__)
 #  define _LIBCPP_OBJECT_FORMAT_MACHO 1
-#elif defined(_WIN32)
+#elif defined(_WIN32) || defined(__UEFI__)
 #  define _LIBCPP_OBJECT_FORMAT_COFF 1
 #elif defined(__wasm__)
 #  define _LIBCPP_OBJECT_FORMAT_WASM 1