diff --git a/triplets/x64-osx.cmake b/triplets/x64-osx.cmake
index af3a8c3483..8cd8c90b4a 100644
--- a/triplets/x64-osx.cmake
+++ b/triplets/x64-osx.cmake
@@ -3,3 +3,4 @@ set(VCPKG_CRT_LINKAGE dynamic)
 set(VCPKG_LIBRARY_LINKAGE static)
 
 set(VCPKG_CMAKE_SYSTEM_NAME Darwin)
+set(VCPKG_OSX_ARCHITECTURES x86_64)