Merge "Fix google-explicit-constructor warnings in bsdiff"
diff --git a/file.h b/file.h
index e9659c7..ad1fd2f 100644
--- a/file.h
+++ b/file.h
@@ -29,7 +29,7 @@
  private:
   // Creates the File instance for the |fd|. Takes ownership of the file
   // descriptor.
-  File(int fd);
+  explicit File(int fd);
 
   int fd_;
 };