diff --git a/src/wp-includes/class-wp-theme.php b/src/wp-includes/class-wp-theme.php
index 88e22758cf..45bf0ae4b5 100644
--- a/src/wp-includes/class-wp-theme.php
+++ b/src/wp-includes/class-wp-theme.php
@@ -1182,6 +1182,19 @@ final class WP_Theme implements ArrayAccess {
 		$post_templates = $this->get_post_templates();
 		$post_templates = isset( $post_templates[ $post_type ] ) ? $post_templates[ $post_type ] : array();
 
+		/**
+		 * Filters list of page templates for a theme.
+		 *
+		 * @since 5.0.0
+		 *
+		 * @param string[]     $post_templates Array of page templates. Keys are filenames,
+		 *                                     values are translated names.
+		 * @param WP_Theme     $this           The theme object.
+		 * @param WP_Post|null $post           The post being edited, provided for context, or null.
+		 * @param string       $post_type      Post type to get the templates for.
+		 */
+		$post_templates = (array) apply_filters( 'theme_templates', $post_templates, $this, $post, $post_type );
+
 		/**
 		 * Filters list of page templates for a theme.
 		 *
@@ -1197,7 +1210,9 @@ final class WP_Theme implements ArrayAccess {
 		 * @param WP_Post|null $post           The post being edited, provided for context, or null.
 		 * @param string       $post_type      Post type to get the templates for.
 		 */
-		return (array) apply_filters( "theme_{$post_type}_templates", $post_templates, $this, $post, $post_type );
+		$post_templates = (array) apply_filters( "theme_{$post_type}_templates", $post_templates, $this, $post, $post_type );
+
+		return $post_templates;
 	}
 
 	/**