diff --git a/lld/MachO/CMakeLists.txt b/lld/MachO/CMakeLists.txt
index ecf6ce609e59f..433ac4ec85853 100644
--- a/lld/MachO/CMakeLists.txt
+++ b/lld/MachO/CMakeLists.txt
@@ -58,6 +58,7 @@ add_lld_library(lldMachO
   LINK_LIBS
   lldCommon
   ${LLVM_PTHREAD_LIB}
+  ${LLVM_ATOMIC_LIB}
 
   DEPENDS
   MachOOptionsTableGen