diff --git a/includes/CategoryTree.php b/includes/CategoryTree.php
index 8659994b..e4da8fad 100644
--- a/includes/CategoryTree.php
+++ b/includes/CategoryTree.php
@@ -78,11 +78,10 @@ class CategoryTree {
 	 * @param bool $hideroot
 	 * @param array $attr
 	 * @param int $depth
-	 * @param bool $allowMissing
 	 * @return bool|string
 	 */
 	public function getTag( ?Parser $parser, string $category, bool $hideroot = false, array $attr = [],
-		int $depth = 1, bool $allowMissing = false
+		int $depth = 1
 	) {
 		$disableCache = $this->config->get( 'CategoryTreeDisableCache' );
 
@@ -114,7 +113,7 @@ class CategoryTree {
 		$attr['data-ct-mode'] = $this->optionManager->getOption( 'mode' );
 		$attr['data-ct-options'] = $this->optionManager->getOptionsAsJsStructure();
 
-		if ( !$allowMissing && !$title->getArticleID() ) {
+		if ( !$title->getArticleID() ) {
 			$html = Html::rawElement( 'span', [ 'class' => 'CategoryTreeNotice' ],
 				wfMessage( 'categorytree-not-found' )
 					->plaintextParams( $category )
diff --git a/includes/Hooks.php b/includes/Hooks.php
index 137ba1f8..b880109a 100644
--- a/includes/Hooks.php
+++ b/includes/Hooks.php
@@ -185,15 +185,13 @@ class Hooks implements
 	 * @param array $argv
 	 * @param Parser|null $parser
 	 * @param PPFrame|null $frame
-	 * @param bool $allowMissing
 	 * @return bool|string
 	 */
 	public function parserHook(
 		$cat,
 		array $argv,
 		Parser $parser = null,
-		PPFrame $frame = null,
-		$allowMissing = false
+		PPFrame $frame = null
 	) {
 		if ( $parser ) {
 			$parserOutput = $parser->getOutput();
@@ -226,7 +224,7 @@ class Hooks implements
 		}
 
 		return $message .
-			$ct->getTag( $parser, $cat, $hideroot, $attr, $depth, $allowMissing );
+			$ct->getTag( $parser, $cat, $hideroot, $attr, $depth );
 	}
 
 	/**
@@ -247,13 +245,17 @@ class Hooks implements
 			// Not enabled, don't do anything
 			return;
 		}
+		if ( !$categoryTitle->exists() ) {
+			// Category doesn't exist. Let the normal LinkRenderer generate the link.
+			return;
+		}
 
 		CategoryTree::setHeaders( $out );
 
 		$options = $this->config->get( 'CategoryTreePageCategoryOptions' );
 		$link = $this->parserHook(
 			$this->titleFormatter->getPrefixedText( $categoryTitle ),
-			$options, null, null, true
+			$options
 		);
 	}