diff --git a/src/meson.build b/src/meson.build
index dc4e02f..11bebe7 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -96,6 +96,7 @@
   requires: stdplus_reqs)
 
 install_headers(
+  'stdplus/cancel.hpp',
   'stdplus/exception.hpp',
   'stdplus/flags.hpp',
   'stdplus/raw.hpp',