diff --git a/utils.cc b/utils.cc
index 5273347..1c9425a 100644
--- a/utils.cc
+++ b/utils.cc
@@ -89,7 +89,7 @@
                                                O_WRONLY | O_CREAT | O_TRUNC,
                                                0600));
   ScopedFileWriterCloser closer(&writer);
-  TEST_AND_RETURN_FALSE_ERRNO(data_len == writer.Write(data, data_len));
+  TEST_AND_RETURN_FALSE_ERRNO(writer.Write(data, data_len));
   return true;
 }