diff --git a/meson.build b/meson.build
index 0038115..d24437d 100644
--- a/meson.build
+++ b/meson.build
@@ -102,6 +102,15 @@
         '-Wno-weak-vtables',
         language: 'cpp',
     )
+    if (cxx.version().version_compare('>=21.0'))
+        # TODO(Ed) These warnings look valid and need cleaned up.
+        add_project_arguments(
+            '-Wno-unique-object-duplication',
+            '-Wno-nrvo',
+            language: 'cpp',
+        )
+    endif
+
     boost_flags += ['-Wno-strict-prototypes', '-Wno-unused-but-set-variable']
     nghttp2_flags += ['-Wno-extra-semi']
 endif