diff --git a/web-animations-1/Overview.bs b/web-animations-1/Overview.bs
index 3a62dbb6615..642d0cde82a 100644
--- a/web-animations-1/Overview.bs
+++ b/web-animations-1/Overview.bs
@@ -3902,9 +3902,9 @@ dictionary DocumentTimelineOptions {
   DOMHighResTimeStamp originTime = 0;
 };
 
-[Exposed=Window,
- Constructor(optional DocumentTimelineOptions options = {})]
+[Exposed=Window]
 interface DocumentTimeline : AnimationTimeline {
+  constructor(optional DocumentTimelineOptions options = {});
 };
 </pre>
 
@@ -3945,10 +3945,10 @@ interface DocumentTimeline : AnimationTimeline {
 API by the {{Animation}} interface.
 
 <pre class='idl'>
-[Exposed=Window,
- Constructor(optional AnimationEffect? effect = null,
-             optional AnimationTimeline? timeline)]
+[Exposed=Window]
 interface Animation : EventTarget {
+             constructor(optional AnimationEffect? effect = null,
+             optional AnimationTimeline? timeline);
              attribute DOMString                id;
              attribute AnimationEffect?         effect;
     readonly attribute AnimationTimeline?       timeline;
@@ -4635,12 +4635,12 @@ dictionary ComputedEffectTiming : EffectTiming {
 <a>Keyframe effects</a> are represented by the {{KeyframeEffect}} interface.
 
 <pre class='idl'>
-[Exposed=Window,
- Constructor((Element or CSSPseudoElement)? target,
-             object? keyframes,
-             optional (unrestricted double or KeyframeEffectOptions) options = {}),
- Constructor(KeyframeEffect source)]
+[Exposed=Window]
 interface KeyframeEffect : AnimationEffect {
+    constructor((Element or CSSPseudoElement)? target,
+             object? keyframes,
+             optional (unrestricted double or KeyframeEffectOptions) options = {});
+    constructor(KeyframeEffect source);
     attribute (Element or CSSPseudoElement)? target;
     attribute CompositeOperation             composite;
     sequence&lt;object&gt; getKeyframes();
@@ -5829,9 +5829,9 @@ CSSPseudoElement includes Animatable;
 {{AnimationPlaybackEvent}} interface.
 
 <pre class='idl'>
-[Exposed=Window,
- Constructor(DOMString type, optional AnimationPlaybackEventInit eventInitDict = {})]
+[Exposed=Window]
 interface AnimationPlaybackEvent : Event {
+    constructor(DOMString type, optional AnimationPlaybackEventInit eventInitDict = {});
     readonly attribute double? currentTime;
     readonly attribute double? timelineTime;
 };