diff --git a/chromeos/constants/chromeos_features.cc b/chromeos/constants/chromeos_features.cc
index a46bb9361f376..6d4f6dcb24abd 100644
--- a/chromeos/constants/chromeos_features.cc
+++ b/chromeos/constants/chromeos_features.cc
@@ -106,6 +106,11 @@ BASE_FEATURE(kEssentialSearch,
              "EssentialSearch",
              base::FEATURE_ENABLED_BY_DEFAULT);
 
+// Feature flag used to enable external display event telemetry.
+BASE_FEATURE(kExternalDisplayEventTelemetry,
+             "ExternalDisplayEventTelemetry",
+             base::FEATURE_DISABLED_BY_DEFAULT);
+
 // Feature flag used to gate preinstallation of the Gemini app.
 BASE_FEATURE(kGeminiAppPreinstall,
              "GeminiAppPreinstall",
diff --git a/chromeos/constants/chromeos_features.h b/chromeos/constants/chromeos_features.h
index 58913249d90c1..c0a78850fda17 100644
--- a/chromeos/constants/chromeos_features.h
+++ b/chromeos/constants/chromeos_features.h
@@ -45,6 +45,8 @@ COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 BASE_DECLARE_FEATURE(kEnablePkcs12ToChapsDualWrite);
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS) BASE_DECLARE_FEATURE(kEssentialSearch);
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
+BASE_DECLARE_FEATURE(kExternalDisplayEventTelemetry);
+COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 BASE_DECLARE_FEATURE(kGeminiAppPreinstall);
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 BASE_DECLARE_FEATURE(kKioskHeartbeatsViaERP);