diff --git a/src/layout/data.rs b/src/layout/data.rs
index ac6ca617..640e88dd 100644
--- a/src/layout/data.rs
+++ b/src/layout/data.rs
@@ -248,7 +248,10 @@ impl<B: Brush> LayoutData<B> {
         let metrics = shaper.metrics();
         let cluster_range = self.clusters.len()..self.clusters.len();
         let coords_start = self.coords.len();
-        self.coords.extend_from_slice(shaper.normalized_coords());
+        let coords = shaper.normalized_coords();
+        if coords.iter().any(|coord| *coord != 0) {
+            self.coords.extend_from_slice(coords);
+        }
         let coords_end = self.coords.len();
         let mut run = RunData {
             font_index,