diff --git a/core/src/main/resources/lib/hudson/ballColorTd.jelly b/core/src/main/resources/lib/hudson/ballColorTd.jelly
index 03e9c3d5900a13616042e83178694d2a548826a7..be8a7808ac3c717ac558e373f18769b1bd1c6abf 100644
--- a/core/src/main/resources/lib/hudson/ballColorTd.jelly
+++ b/core/src/main/resources/lib/hudson/ballColorTd.jelly
@@ -27,6 +27,9 @@ THE SOFTWARE.
     <st:attribute name="it" type="hudson.model.BallColor">
       Color of the ball or null to skip drawing.
     </st:attribute>
+    <st:attribute name="style">
+      Additional CSS styles to apply.
+    </st:attribute>
   </st:documentation>
   <td data="${it.ordinal()}">
     <j:if test="${it!=null}">