diff --git a/spec/index.bs b/spec/index.bs
index 808e3eadf9..befe430ca5 100644
--- a/spec/index.bs
+++ b/spec/index.bs
@@ -2668,7 +2668,7 @@ interface GPUAdapter {
                             - |value| must be no [=limit/better=] than the value of that limit in
                                 |adapter|.{{adapter/[[limits]]}}.
                             - If the limit's [=limit class|class=] is [=limit class/alignment=],
-                                |value| must be a power of 2.
+                                |value| must be a power of 2 less than 2<sup>32</sup>.
                     </div>
 
                     Then issue the following steps on <var data-timeline=content>contentTimeline</var>