--- a/node.gyp
+++ b/node.gyp
@@ -289,7 +289,7 @@
           '-Wl,-bnoerrmsg',
         ],
       }],
-      ['OS in ("linux", "mac") and llvm_version != "0.0"', {
+      ['OS=="linux" and llvm_version!=0', {
         'libraries': ['-latomic'],
       }],
     ],