diff --git a/include/meson.build b/include/meson.build
index c3bfdfe..358bc32 100644
--- a/include/meson.build
+++ b/include/meson.build
@@ -6,6 +6,7 @@
   'stdplus/flags.hpp',
   'stdplus/handle/copyable.hpp',
   'stdplus/handle/managed.hpp',
+  'stdplus/hash.hpp',
   'stdplus/pinned.hpp',
   'stdplus/raw.hpp',
   'stdplus/signal.hpp',