--- a/op_builder/cpu/builder.py
+++ b/op_builder/cpu/builder.py
@@ -16,6 +16,9 @@
 
 class CPUOpBuilder(OpBuilder):
 
+    def extra_ldflags(self):
+        return ['-lomp']
+
     def builder(self):
         from torch.utils.cpp_extension import CppExtension as ExtensionBuilder
         include_dirs = [os.path.abspath(x) for x in self.strip_empty_entries(self.include_paths())]