--- a/layout/generic/nsGfxScrollFrame.cpp
+++ b/layout/generic/nsGfxScrollFrame.cpp
@@ -2348,17 +2348,18 @@ ScrollFrameHelper::ScrollToWithOrigin(ns
 
         if (!mAsyncSmoothMSDScroll->SetRefreshObserver(this)) {
           // Observer setup failed. Scroll the normal way.
           CompleteAsyncScroll(range, aOrigin);
           return;
         }
       } else {
         // A previous smooth MSD scroll is still in progress, so we just need to
-        // update its destination.
+        // update its range and destination.
+        mAsyncSmoothMSDScroll->SetRange(GetScrollRangeForClamping());
         mAsyncSmoothMSDScroll->SetDestination(mDestination);
       }
 
       return;
     } else {
       if (mAsyncSmoothMSDScroll) {
         currentVelocity = mAsyncSmoothMSDScroll->GetVelocity();
         mAsyncSmoothMSDScroll = nullptr;