diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index c0cc3aa6..9f5003a5 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -75,7 +75,8 @@ list(REMOVE_ITEM DCRT_C ${RUNTIME_DC_DIR}/deh.c ${RUNTIME_DC_DIR}/dylib_fixes.c)
 if(UNIX)
     file(GLOB_RECURSE CORE_D_SYS ${RUNTIME_DIR}/src/core/sys/posix/*.d)
     if(APPLE)
-        file(GLOB_RECURSE CORE_D_SYS ${RUNTIME_DIR}/src/core/sys/osx/*.d)
+        file(GLOB_RECURSE CORE_D_SYS_OSX ${RUNTIME_DIR}/src/core/sys/osx/*.d)
+        list(APPEND CORE_D_SYS ${CORE_D_SYS_OSX})
     endif()
 elseif(WIN32)
     file(GLOB_RECURSE CORE_D_SYS ${RUNTIME_DIR}/src/core/sys/windows/*.d)