diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index da3fe20e..c1c5b2f1 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1191,6 +1191,14 @@
     "for the request to proceed. See also: "
     "https://developer.chrome.com/blog/private-network-access-preflight/";
 
+const char kPrivateNetworkAccessPreflightShortTimeoutName[] =
+    "Reduce waiting time for Private Network Access preflights response";
+const char kPrivateNetworkAccessPreflightShortTimeoutDescription[] =
+    "Reduce the waiting time for Private Network Access preflights to 200 "
+    "milliseconds. The default timeout period for requests is 5 minutes."
+    "See also: "
+    "https://developer.chrome.com/blog/private-network-access-preflight/";
+
 const char kDeprecateAltClickName[] =
     "Enable Alt+Click deprecation notifications";
 const char kDeprecateAltClickDescription[] =