diff --git a/src/Manifest.hpp b/src/Manifest.hpp
index 96c188a1a..bb3dc236a 100644
--- a/src/Manifest.hpp
+++ b/src/Manifest.hpp
@@ -95,8 +95,8 @@ struct Lint {
 };
 
 struct DepMetadata {
-  std::string includes;  // -Isomething
-  std::string libs;      // -Lsomething -lsomething
+  const std::string includes;  // -Isomething
+  const std::string libs;      // -Lsomething -lsomething
 };
 
 struct GitDependency {