diff --git a/ext_emconf.php b/ext_emconf.php
index 0fedc4bcdd75e117ba3aec4480348b15ffb521c9..035df4605c748554d852c4dc18cf3199dd237015 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -29,6 +29,7 @@ $EM_CONF[$_EXTKEY] = [
 					'ch_rterecords' => '',
 					'linkhandler' => '',
 					'rtehtmlarea' => '',
+					'rte_ckeditor' => '',
 					'rte_tinymce' => '',
 					'tinyrteru' => '',
 					'tinyrte' => '',