diff --git a/dom/animation/Animation.cpp b/dom/animation/Animation.cpp
index eb5945c83de1..46e5cd0554fb 100644
--- a/dom/animation/Animation.cpp
+++ b/dom/animation/Animation.cpp
@@ -252,16 +252,16 @@ Animation::IsInEffect() const
   return computedTiming.mTimeFraction != ComputedTiming::kNullTimeFraction;
 }
 
-bool
-Animation::HasAnimationOfProperty(nsCSSProperty aProperty) const
+const AnimationProperty*
+Animation::GetAnimationOfProperty(nsCSSProperty aProperty) const
 {
   for (size_t propIdx = 0, propEnd = mProperties.Length();
        propIdx != propEnd; ++propIdx) {
     if (aProperty == mProperties[propIdx].mProperty) {
-      return true;
+      return &mProperties[propIdx];
     }
   }
-  return false;
+  return nullptr;
 }
 
 void
diff --git a/dom/animation/Animation.h b/dom/animation/Animation.h
index d258417248a8..93cb4b2526e8 100644
--- a/dom/animation/Animation.h
+++ b/dom/animation/Animation.h
@@ -305,7 +305,11 @@ public:
   bool IsCurrent() const;
   bool IsInEffect() const;
 
-  bool HasAnimationOfProperty(nsCSSProperty aProperty) const;
+  const AnimationProperty*
+  GetAnimationOfProperty(nsCSSProperty aProperty) const;
+  bool HasAnimationOfProperty(nsCSSProperty aProperty) const {
+    return GetAnimationOfProperty(aProperty) != nullptr;
+  }
   const InfallibleTArray<AnimationProperty>& Properties() const {
     return mProperties;
   }