diff --git a/src/meson.build b/src/meson.build
index 2a08ac5..7c4dabf 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -51,6 +51,7 @@
   'raw.cpp',
   'signal.cpp',
   'str/cat.cpp',
+  'str/cexpr.cpp',
   'util/cexec.cpp',
   'zstring.cpp',
   'zstring_view.cpp',