1 files changed, 1 insertions, 1 deletions
diff --git a/ebml/src/write.rs b/ebml/src/write.rs
index 2191693..fc12ffc 100644
--- a/ebml/src/write.rs
+++ b/ebml/src/write.rs
@@ -148,7 +148,7 @@ impl WriteValue for Master {
                 for c in c {
                     c.write_full(&mut ib)?;
                 }
-                EbmlSize::Exact(ib.len()).write_to(w);
+                EbmlSize::Exact(ib.len()).write_to(w)?;
                 w.extend_from_slice(&ib);
                 Ok(())
             }