diff --git a/runtime/cmake/PublicProducts.cmake b/runtime/cmake/PublicProducts.cmake
index 98ce39a4a..99032b6bd 100644
--- a/runtime/cmake/PublicProducts.cmake
+++ b/runtime/cmake/PublicProducts.cmake
@@ -85,10 +85,13 @@ target_link_libraries(mkw_runtime_common PRIVATE mkw_platform mkw::pugixml mkw::
 if(MKW_PLATFORM_WINDOWS)
     target_link_libraries(mkw_runtime_common PRIVATE shell32 windowsapp)
 elseif(MKW_PLATFORM_LINUX OR MKW_PLATFORM_MACOS_X86_64)
+    # libco is used by Linux and Intel macOS. Apple Silicon uses the local
+    # x18-safe assembly backend and therefore does not define mkw::libco.
     # ${CMAKE_DL_LIBS} for music_attenuation.cpp's dlopen of libdbus-1 (MPRIS
     # media monitoring). Empty on platforms where dl* is already in libc/libSystem.
     target_link_libraries(mkw_runtime_common PRIVATE mkw::libco ${CMAKE_DL_LIBS})
 endif()
+
 if(MKW_CPPWINRT_INCLUDE_DIR)
     if(NOT EXISTS "${MKW_CPPWINRT_INCLUDE_DIR}/winrt/base.h")
         message(FATAL_ERROR