diff --git a/src/Event/HtmlFilterEvent.php b/src/Event/HtmlFilterEvent.php
index d2bfbf19c4..12df8f78b8 100644
--- a/src/Event/HtmlFilterEvent.php
+++ b/src/Event/HtmlFilterEvent.php
@@ -14,13 +14,13 @@ namespace Friendica\Event;
  */
 final class HtmlFilterEvent
 {
-	public const HEAD = 'html.head';
+	public const HEAD = 'friendica.html.head';
 
-	public const FOOTER = 'html.footer';
+	public const FOOTER = 'friendica.html.footer';
 
-	public const PAGE_CONTENT_TOP = 'html.page_content_top';
+	public const PAGE_CONTENT_TOP = 'friendica.html.page_content_top';
 
-	public const PAGE_END = 'html.page_end';
+	public const PAGE_END = 'friendica.html.page_end';
 
 	private string $name;
 
diff --git a/tests/Unit/Event/HtmlFilterEventTest.php b/tests/Unit/Event/HtmlFilterEventTest.php
index 183c13c727..819aef6e45 100644
--- a/tests/Unit/Event/HtmlFilterEventTest.php
+++ b/tests/Unit/Event/HtmlFilterEventTest.php
@@ -17,10 +17,10 @@ class HtmlFilterEventTest extends TestCase
 	public static function getPublicConstants(): array
 	{
 		return [
-			[HtmlFilterEvent::HEAD, 'html.head'],
-			[HtmlFilterEvent::FOOTER, 'html.footer'],
-			[HtmlFilterEvent::PAGE_CONTENT_TOP, 'html.page_content_top'],
-			[HtmlFilterEvent::PAGE_END, 'html.page_end'],
+			[HtmlFilterEvent::HEAD, 'friendica.html.head'],
+			[HtmlFilterEvent::FOOTER, 'friendica.html.footer'],
+			[HtmlFilterEvent::PAGE_CONTENT_TOP, 'friendica.html.page_content_top'],
+			[HtmlFilterEvent::PAGE_END, 'friendica.html.page_end'],
 		];
 	}