diff --git a/lld/MachO/CMakeLists.txt b/lld/MachO/CMakeLists.txt
--- a/lld/MachO/CMakeLists.txt
+++ b/lld/MachO/CMakeLists.txt
@@ -52,3 +52,7 @@
   MachOOptionsTableGen
   ${tablegen_deps}
   )
+
+if(HAVE_LIBXAR)
+  target_link_libraries(lldMachO2 PRIVATE ${XAR_LIB})
+endif()