diff --git a/typo3/sysext/backend/Classes/Form/Element/AbstractFormElement.php b/typo3/sysext/backend/Classes/Form/Element/AbstractFormElement.php
index 3625081394579ae2752c968a82277f957c3a2059..95a2283aa86dc26fe6acca8c6fa97d453825f441 100644
--- a/typo3/sysext/backend/Classes/Form/Element/AbstractFormElement.php
+++ b/typo3/sysext/backend/Classes/Form/Element/AbstractFormElement.php
@@ -326,8 +326,8 @@ abstract class AbstractFormElement {
 						$onlyIfSelectedJS =
 							'if (!TBE_EDITOR.curSelected(\'' . $itemName . $listFlag . '\')){' .
 								'alert(' . GeneralUtility::quoteJSvalue($notSelectedText) . ');' .
-								'return false; .
-							}';
+								'return false;' .
+							'}';
 					}
 					$aOnClick =
 						'this.blur();' .