diff --git a/reference/image/functions/imagerotate.xml b/reference/image/functions/imagerotate.xml
index d150f3c697..f9f9063ae3 100644
--- a/reference/image/functions/imagerotate.xml
+++ b/reference/image/functions/imagerotate.xml
@@ -60,7 +60,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns an image resource for the rotated image.
+   Returns an image resource for the rotated image, &return.falseforfailure;.
   </para>
  </refsect1>
  <refsect1 role="changelog">