diff --git a/orc/src/main/java/org/apache/iceberg/orc/OrcFileAppender.java b/orc/src/main/java/org/apache/iceberg/orc/OrcFileAppender.java
index 518aa1c52e2d..34f71fcc232e 100644
--- a/orc/src/main/java/org/apache/iceberg/orc/OrcFileAppender.java
+++ b/orc/src/main/java/org/apache/iceberg/orc/OrcFileAppender.java
@@ -101,7 +101,7 @@ public Metrics metrics() {
   public long length() {
     Preconditions.checkState(isClosed,
         "Cannot return length while appending to an open file.");
-    return writer.getRawDataSize();
+    return file.toInputFile().getLength();
   }
 
   @Override