diff --git a/include/meson.build b/include/meson.build
index 83b536c..dc4de82 100644
--- a/include/meson.build
+++ b/include/meson.build
@@ -9,6 +9,7 @@
   'stdplus/pinned.hpp',
   'stdplus/raw.hpp',
   'stdplus/signal.hpp',
+  'stdplus/str/cat.hpp',
   'stdplus/util/cexec.hpp',
   'stdplus/util/string.hpp',
   'stdplus/zstring.hpp',