diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5b14f87..c655ec24 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -36,6 +36,7 @@ This release has an [MSRV] of 1.82.
 
 #### Parley
 
+- `TreeBuilder`'s root style fills line metrics even when the text is empty. ([#393][] by [@kekelp][])
 - Selection extension moves the focus to the side being extended. ([#385][] by [@kekelp][])
 - Ranged builder default style not respecting `scale`. ([#368][] by [@xStrom][])
 
@@ -321,6 +322,7 @@ This release has an [MSRV][] of 1.70.
 [#385]: https://github.com/linebender/parley/pull/385
 [#389]: https://github.com/linebender/parley/pull/389
 [#390]: https://github.com/linebender/parley/pull/390
+[#393]: https://github.com/linebender/parley/pull/393
 
 [Unreleased]: https://github.com/linebender/parley/compare/v0.5.0...HEAD
 [0.5.0]: https://github.com/linebender/parley/compare/v0.4.0...v0.5.0
diff --git a/parley/src/layout/alignment.rs b/parley/src/layout/alignment.rs
index f8bbbd2e..e81ff53c 100644
--- a/parley/src/layout/alignment.rs
+++ b/parley/src/layout/alignment.rs
@@ -148,6 +148,7 @@ fn align_impl<B: Brush, const UNDO_JUSTIFICATION: bool>(
                             }
                             if cluster.info.whitespace().is_space_or_nbsp() {
                                 cluster.advance += adjustment;
+                                line.metrics.advance += adjustment;
                                 applied += 1;
                             }
                         });
diff --git a/parley/src/resolve/tree.rs b/parley/src/resolve/tree.rs
index f6ec5845..1c23ecc8 100644
--- a/parley/src/resolve/tree.rs
+++ b/parley/src/resolve/tree.rs
@@ -200,6 +200,13 @@ impl<B: Brush> TreeStyleBuilder<B> {
         styles.clear();
         styles.extend_from_slice(&self.flatted_styles);
 
+        if styles.is_empty() && self.text.is_empty() {
+            styles.push(RangedStyle {
+                style: self.tree[0].style.clone(),
+                range: 0..0,
+            });
+        }
+
         core::mem::take(&mut self.text)
     }
 }