diff --git a/lib/public/IURLGenerator.php b/lib/public/IURLGenerator.php
index 8229d51f2316b..f62503f14ec84 100644
--- a/lib/public/IURLGenerator.php
+++ b/lib/public/IURLGenerator.php
@@ -95,6 +95,7 @@ public function linkTo(string $appName, string $file, array $args = []): string;
 	 * @param string $appName the name of the app
 	 * @param string $file the name of the file
 	 * @return string the url
+	 * @throws \RuntimeException If the image does not exist
 	 * @since 6.0.0
 	 */
 	public function imagePath(string $appName, string $file): string;