diff --git a/meson.build b/meson.build
index e0893a6..68c56c6 100644
--- a/meson.build
+++ b/meson.build
@@ -66,6 +66,7 @@
         'certs_manager.cpp',
         'csr.cpp',
         'watch.cpp',
+        'x509_utils.cpp',
     ],
     dependencies: phosphor_certificate_deps,
 )