diff --git a/config_defaults_inc.php b/config_defaults_inc.php
index 35bcdc3e9f..8ce64938e4 100644
--- a/config_defaults_inc.php
+++ b/config_defaults_inc.php
@@ -4279,7 +4279,8 @@
 	'class_path','library_path', 'language_path', 'absolute_path_default_upload_folder',
 	'ldap_simulation_file_path', 'plugin_path', 'bottom_include_page', 'top_include_page',
 	'default_home_page', 'logout_redirect_page', 'manual_url', 'logo_url', 'wiki_engine_url',
-	'cdn_enabled', 'public_config_names', 'email_login_enabled', 'email_ensure_unique'
+	'cdn_enabled', 'public_config_names', 'email_login_enabled', 'email_ensure_unique',
+	'impersonate_user_threshold'
 );
 
 /**
diff --git a/core/authentication_api.php b/core/authentication_api.php
index 7323ce33e8..e56e1b4435 100644
--- a/core/authentication_api.php
+++ b/core/authentication_api.php
@@ -542,7 +542,7 @@ function auth_impersonate( $p_user_id ) {
  * @return bool true: can impersonate, false: can't.
  */
 function auth_can_impersonate( $p_user_id ) {
-	if( !access_has_global_level( config_get( 'impersonate_user_threshold' ) ) ) {
+	if( !access_has_global_level( config_get_global( 'impersonate_user_threshold' ) ) ) {
 		return false;
 	}