diff --git a/src/meson.build b/src/meson.build
index a59cffd..204110f 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -44,6 +44,7 @@
 stdplus_srcs = [
   'exception.cpp',
   'signal.cpp',
+  'zstring.cpp',
   'zstring_view.cpp',
 ]