diff --git a/src/feature-flags.ts b/src/feature-flags.ts
index efb95eaab..0ee38bd91 100644
--- a/src/feature-flags.ts
+++ b/src/feature-flags.ts
@@ -7,6 +7,7 @@ import { getApiClient } from "./api-client";
 import type { CodeQL } from "./codeql";
 import * as defaults from "./defaults.json";
 import { Logger } from "./logging";
+import { CODEQL_OVERLAY_MINIMUM_VERSION } from "./overlay-database-utils";
 import { RepositoryNwo } from "./repository";
 import { ToolsFeature } from "./tools-features";
 import * as util from "./util";
@@ -52,6 +53,7 @@ export enum Feature {
   DisableKotlinAnalysisEnabled = "disable_kotlin_analysis_enabled",
   ExportDiagnosticsEnabled = "export_diagnostics_enabled",
   ExtractToToolcache = "extract_to_toolcache",
+  OverlayAnalysis = "overlay_analysis",
   PythonDefaultIsToNotExtractStdlib = "python_default_is_to_not_extract_stdlib",
   QaTelemetryEnabled = "qa_telemetry_enabled",
   RustAnalysis = "rust_analysis",
@@ -148,6 +150,11 @@ export const featureConfig: Record<
     envVar: "CODEQL_ACTION_EXTRACT_TOOLCACHE",
     minimumVersion: undefined,
   },
+  [Feature.OverlayAnalysis]: {
+    defaultValue: false,
+    envVar: "CODEQL_ACTION_OVERLAY_ANALYSIS",
+    minimumVersion: CODEQL_OVERLAY_MINIMUM_VERSION,
+  },
   [Feature.PythonDefaultIsToNotExtractStdlib]: {
     defaultValue: false,
     envVar: "CODEQL_ACTION_DISABLE_PYTHON_STANDARD_LIBRARY_EXTRACTION",