diff --git a/src/main/java/com/tomfran/lsm/sstable/SSTable.java b/src/main/java/com/tomfran/lsm/sstable/SSTable.java
index b00f44e..ce75436 100644
--- a/src/main/java/com/tomfran/lsm/sstable/SSTable.java
+++ b/src/main/java/com/tomfran/lsm/sstable/SSTable.java
@@ -96,7 +96,7 @@ private void initializeFromDisk(String filename) {
 
         int sizeCumulative = 0;
         sparseSizeCount.add(sizeCumulative);
-        for (int i = 0; i < sparseSize; i++) {
+        for (int i = 0; i < sparseSize - 1; i++) {
             sizeCumulative += indexIs.readVByteInt();
             sparseSizeCount.add(sizeCumulative);
         }
diff --git a/src/test/java/com/tomfran/lsm/sstable/SSTableReconstructTest.java b/src/test/java/com/tomfran/lsm/sstable/SSTableReconstructTest.java
index f7fc56e..b1acbd0 100644
--- a/src/test/java/com/tomfran/lsm/sstable/SSTableReconstructTest.java
+++ b/src/test/java/com/tomfran/lsm/sstable/SSTableReconstructTest.java
@@ -51,10 +51,10 @@ void shouldReconstruct() {
         assert t2.sparseOffsets.size() == t1.sparseOffsets.size();
         for (var i = 0; i < t2.sparseOffsets.size(); i++)
             assert t2.sparseOffsets.getLong(i) == t1.sparseOffsets.getLong(i);
-//
-//        assert t2.sparseKeys.size() == t1.sparseKeys.size() : "keys lenght don't match";
-//        for (var i = 0; i < t2.sparseKeys.size(); i++)
-//            assert compare(t2.sparseKeys.get(i), t1.sparseKeys.get(i)) == 0 : "keys don't match";
+
+        assert t2.sparseKeys.size() == t1.sparseKeys.size() : "keys lenght don't match";
+        for (var i = 0; i < t2.sparseKeys.size(); i++)
+            assert compare(t2.sparseKeys.get(i), t1.sparseKeys.get(i)) == 0 : "keys don't match";
 
         t2.close();
     }