diff --git a/class.t3lib_tcemain.php b/class.t3lib_tcemain.php
index 2367eef..41e6c72 100644
--- a/class.t3lib_tcemain.php
+++ b/class.t3lib_tcemain.php
@@ -5343,9 +5343,11 @@ class t3lib_TCEmain {
 		$list = array();
 		foreach (array_keys($GLOBALS['TCA']) as $table) {
 			t3lib_div::loadTCA($table);
-			foreach ($GLOBALS['TCA'][$table]['columns'] as $field => $config) {
-				if ($config['exclude'] && !t3lib_div::inList($this->BE_USER->groupData['non_exclude_fields'], $table . ':' . $field)) {
-					$list[] = $table . '-' . $field;
+			if (isset($GLOBALS['TCA'][$table]['columns'])) {
+				foreach ($GLOBALS['TCA'][$table]['columns'] as $field => $config) {
+					if ($config['exclude'] && !t3lib_div::inList($this->BE_USER->groupData['non_exclude_fields'], $table . ':' . $field)) {
+						$list[] = $table . '-' . $field;
+					}
 				}
 			}
 		}