1 files changed, 5 insertions, 2 deletions
diff --git a/src/main/java/io/trygvis/btree/HeapFile.java b/src/main/java/io/trygvis/btree/HeapFile.java
index 7a960c8..6bd0451 100644
--- a/src/main/java/io/trygvis/btree/HeapFile.java
+++ b/src/main/java/io/trygvis/btree/HeapFile.java
@@ -37,15 +37,18 @@ public class HeapFile implements Closeable {
         return HeapPage.heapPageFromBytes(page, buffer);
     }
 
-    public void writePage(HeapPage page) throws IOException {
+    public long writePage(HeapPage page) throws IOException {
         long position;
         if (page.pageNumber == -1) {
-            position = file.length();
+            position = channel.size();
         } else {
             position = page.pageNumber * PAGE_SIZE;
         }
+        page.bytes.rewind();
         channel.write(page.bytes, position);
         channel.force(true);
+
+        return position / PAGE_SIZE;
     }
 
     public long pageCount() throws IOException {