diff --git a/logstash-core/src/main/java/org/logstash/ackedqueue/io/MmapPageIOV2.java b/logstash-core/src/main/java/org/logstash/ackedqueue/io/MmapPageIOV2.java
index 2c8dd403a..ecb4ee170 100644
--- a/logstash-core/src/main/java/org/logstash/ackedqueue/io/MmapPageIOV2.java
+++ b/logstash-core/src/main/java/org/logstash/ackedqueue/io/MmapPageIOV2.java
@@ -190,6 +190,7 @@ public final class MmapPageIOV2 implements PageIO {
         }
         buffer.position(0);
         buffer.put(VERSION_TWO);
+        buffer.force();
         this.head = 1;
         this.minSeqNum = 0L;
         this.elementCount = 0;