diff --git a/src/google/protobuf/compiler/csharp/csharp_reflection_class.cc b/src/google/protobuf/compiler/csharp/csharp_reflection_class.cc
index 644fbf16f9..d9ab4b49b0 100644
--- a/src/google/protobuf/compiler/csharp/csharp_reflection_class.cc
+++ b/src/google/protobuf/compiler/csharp/csharp_reflection_class.cc
@@ -128,7 +128,7 @@ void ReflectionClassGenerator::WriteIntroduction(io::Printer* printer) {
     "//     Generated by the protocol buffer compiler.  DO NOT EDIT!\n"
     "//     source: $file_name$\n"
     "// </auto-generated>\n"
-    "#pragma warning disable 1591, 0612, 3021\n"
+    "#pragma warning disable 1591, 0612, 3021, 8981\n"
     "#region Designer generated code\n"
     "\n"
     "using pb = global::Google.Protobuf;\n"