diff --git a/src/mp/gen.cpp b/src/mp/gen.cpp
index c78d6ffa..6c31310d 100644
--- a/src/mp/gen.cpp
+++ b/src/mp/gen.cpp
@@ -213,7 +213,11 @@ void Generate(kj::StringPtr src_prefix,
     h << "#include <" << PROXY_DECL << ">\n\n";
     h << "#if defined(__GNUC__)\n";
     h << "#pragma GCC diagnostic push\n";
+    h << "#if !defined(__has_warning)\n";
     h << "#pragma GCC diagnostic ignored \"-Wsuggest-override\"\n";
+    h << "#elif __has_warning(\"-Wsuggest-override\")\n";
+    h << "#pragma GCC diagnostic ignored \"-Wsuggest-override\"\n";
+    h << "#endif\n";
     h << "#endif\n";
     h << "namespace mp {\n";