diff --git a/extension.json b/extension.json
index beed6127..6f2ed71c 100644
--- a/extension.json
+++ b/extension.json
@@ -42,7 +42,6 @@
 				"mediawiki.api.options"
 			],
 			"messages": [
-				"revisionslider-show-help",
 				"revisionslider-show-help-tooltip",
 				"revisionslider-loading-failed",
 				"revisionslider-toggle-title-expand",