diff --git a/runtime/utils.h b/runtime/utils.h
index 83ac0b8..c1e88a4 100644
--- a/runtime/utils.h
+++ b/runtime/utils.h
@@ -296,6 +296,7 @@
 
 // Returns true if the file exists.
 bool FileExists(const std::string& filename);
+bool FileExistsAndNotEmpty(const std::string& filename);
 
 class VoidFunctor {
  public: