diff --git a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
index e23bbc2..546a4d4 100644
--- a/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
+++ b/hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/frames/RTreeNSMFrame.java
@@ -86,7 +86,7 @@
 	@Override
 	public void initBuffer(byte level) {
 		super.initBuffer(level);
-		buf.putInt(pageNsnOff, 0);
+		buf.putLong(pageNsnOff, 0);
 		buf.putInt(rightPageOff, -1);
 	}