diff --git a/src/feature-flags.ts b/src/feature-flags.ts
index 77ae5c3f96..df1b7cd92e 100644
--- a/src/feature-flags.ts
+++ b/src/feature-flags.ts
@@ -50,6 +50,8 @@ export interface FeatureEnablement {
 export enum Feature {
   ArtifactV4Upgrade = "artifact_v4_upgrade",
   CleanupTrapCaches = "cleanup_trap_caches",
+  CppBuildModeNoneDisabled = "cpp_build_mode_none_disabled",
+  CppBuildModeNoneEnabled = "cpp_build_mode_none_enabled",
   CppDependencyInstallation = "cpp_dependency_installation_enabled",
   DiffInformedQueries = "diff_informed_queries",
   DisableCsharpBuildless = "disable_csharp_buildless",
@@ -103,6 +105,16 @@ export const featureConfig: Record<
     envVar: "CODEQL_ACTION_CLEANUP_TRAP_CACHES",
     minimumVersion: undefined,
   },
+  [Feature.CppBuildModeNoneDisabled]: {
+    defaultValue: false,
+    envVar: "CODEQL_EXTRACTOR_CPP_BUILD_MODE_NONE_DISABLED",
+    minimumVersion: undefined,
+  },
+  [Feature.CppBuildModeNoneEnabled]: {
+    defaultValue: false,
+    envVar: "CODEQL_EXTRACTOR_CPP_BUILD_MODE_NONE_ENABLED",
+    minimumVersion: undefined,
+  },
   [Feature.CppDependencyInstallation]: {
     defaultValue: false,
     envVar: "CODEQL_EXTRACTOR_CPP_AUTOINSTALL_DEPENDENCIES",