diff --git a/layout/generic/nsGridContainerFrame.cpp b/layout/generic/nsGridContainerFrame.cpp
index 7cfb8b759425..5c34cd875688 100644
--- a/layout/generic/nsGridContainerFrame.cpp
+++ b/layout/generic/nsGridContainerFrame.cpp
@@ -1181,7 +1181,7 @@ struct nsGridContainerFrame::TrackSizingFunctions {
       }
       auto& value = mTrackListValues[i];
       if (value.IsTrackSize()) {
-        mExpandedTracks.AppendElement(MakePair(i, 0ul));
+        mExpandedTracks.AppendElement(MakePair(i, size_t(0)));
         mExpandedLineNames.AppendElement(std::move(names));
         continue;
       }
@@ -1190,7 +1190,7 @@ struct nsGridContainerFrame::TrackSizingFunctions {
         MOZ_ASSERT(i == mRepeatAutoStart);
         mRepeatAutoStart = mExpandedTracks.Length();
         mRepeatAutoEnd = mRepeatAutoStart;
-        mExpandedTracks.AppendElement(MakePair(i, 0ul));
+        mExpandedTracks.AppendElement(MakePair(i, size_t(0)));
 
         auto repeatNames = repeat.line_names.AsSpan();
         MOZ_ASSERT(repeatNames.Length() == 2);
diff --git a/servo/components/style/properties/longhands/position.mako.rs b/servo/components/style/properties/longhands/position.mako.rs
index f5d1a1d1cd0a..b2e8acaf60be 100644
--- a/servo/components/style/properties/longhands/position.mako.rs
+++ b/servo/components/style/properties/longhands/position.mako.rs
@@ -375,7 +375,6 @@ ${helpers.predefined_type(
         "specified::GenericGridTemplateComponent::None",
         engines="gecko",
         spec="https://drafts.csswg.org/css-grid/#propdef-grid-template-%ss" % kind,
-        boxed=True,
         animation_value_type="ComputedValue",
     )}