diff --git a/example/main.go b/example/main.go
index 31c59c7..d375917 100644
--- a/example/main.go
+++ b/example/main.go
@@ -39,7 +39,7 @@
 		sequence += Reservations
 		writer.Await(sequence)
 		ringBuffer[sequence&BufferMask] = sequence
-		writer.Commit(sequence)
+		writer.Commit(sequence, sequence)
 	}
 }
 
@@ -49,7 +49,7 @@
 // 	for sequence <= Iterations {
 // 		sequence = writer.Reserve(Reservations)
 // 		ringBuffer[sequence&BufferMask] = sequence
-// 		writer.Commit(sequence)
+// 		writer.Commit(sequence, sequence)
 // 	}
 // }
 
diff --git a/writer.go b/writer.go
index d580b8a..45e7e72 100644
--- a/writer.go
+++ b/writer.go
@@ -40,6 +40,6 @@
 		this.gate = this.upstream.Read(0)
 	}
 }
-func (this *Writer) Commit(sequence int64) {
-	this.written.sequence = sequence
+func (this *Writer) Commit(lower, upper int64) {
+	this.written.sequence = upper
 }