diff --git a/atom/browser/net/system_network_context_manager.cc b/atom/browser/net/system_network_context_manager.cc
index 52e4f2673f15a..db0818c92936a 100644
--- a/atom/browser/net/system_network_context_manager.cc
+++ b/atom/browser/net/system_network_context_manager.cc
@@ -51,6 +51,8 @@ network::mojom::HttpAuthDynamicParamsPtr CreateHttpAuthDynamicParams() {
       command_line->GetSwitchValueASCII(atom::switches::kAuthServerWhitelist);
   auth_dynamic_params->delegate_whitelist = command_line->GetSwitchValueASCII(
       atom::switches::kAuthNegotiateDelegateWhitelist);
+  auth_dynamic_params->enable_negotiate_port =
+      command_line->HasSwitch(atom::switches::kEnableAuthNegotiatePort);
 
   return auth_dynamic_params;
 }
diff --git a/atom/common/options_switches.cc b/atom/common/options_switches.cc
index d7cbf532ea8d8..f551fe3a29073 100644
--- a/atom/common/options_switches.cc
+++ b/atom/common/options_switches.cc
@@ -263,6 +263,9 @@ const char kAuthServerWhitelist[] = "auth-server-whitelist";
 const char kAuthNegotiateDelegateWhitelist[] =
     "auth-negotiate-delegate-whitelist";
 
+// If set, include the port in generated Kerberos SPNs.
+const char kEnableAuthNegotiatePort[] = "enable-auth-negotiate-port";
+
 }  // namespace switches
 
 }  // namespace atom
diff --git a/atom/common/options_switches.h b/atom/common/options_switches.h
index 346fbcfc0cc99..93efae3b12cb8 100644
--- a/atom/common/options_switches.h
+++ b/atom/common/options_switches.h
@@ -126,6 +126,7 @@ extern const char kDiskCacheSize[];
 extern const char kIgnoreConnectionsLimit[];
 extern const char kAuthServerWhitelist[];
 extern const char kAuthNegotiateDelegateWhitelist[];
+extern const char kEnableAuthNegotiatePort[];
 
 }  // namespace switches