diff --git a/src/beast/evolution/likelihood/PartitionPositionLogger.java b/src/beast/evolution/likelihood/PartitionPositionLogger.java
index d7bf0b9..1789115 100644
--- a/src/beast/evolution/likelihood/PartitionPositionLogger.java
+++ b/src/beast/evolution/likelihood/PartitionPositionLogger.java
@@ -30,7 +30,7 @@ public void init(PrintStream out) {
 	}
 
 	@Override
-	public void log(int nSample, PrintStream out) {
+	public void log(long nSample, PrintStream out) {
 		int sum = 0;
 		for (int i = 0; i< partitionLengths.getDimension() - 1; i++) {
 			sum += partitionLengths.getValue(i);