diff --git a/WHATSNEW b/WHATSNEW
index 6ccdfc706..b4c78519e 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -57,6 +57,7 @@ Fixed bugs:
 
  * ZipFile failed to clean up some resources which could lead to
    OutOfMemoryException while unzipping large archives.
+   A similar problem in ZipArchiveOutputStream has been fixed as well.
    Bugzilla Report 42969.
 
  * quiet attribute added to the copy and move tasks, to be used together
diff --git a/src/main/org/apache/tools/zip/ZipOutputStream.java b/src/main/org/apache/tools/zip/ZipOutputStream.java
index c9e3125fa..c1d73b3df 100644
--- a/src/main/org/apache/tools/zip/ZipOutputStream.java
+++ b/src/main/org/apache/tools/zip/ZipOutputStream.java
@@ -409,6 +409,7 @@ public class ZipOutputStream extends FilterOutputStream {
         writeCentralDirectoryEnd();
         offsets.clear();
         entries.clear();
+        def.end();
     }
 
     /**