diff --git a/src/osgPlugins/zip/ZipArchive.cpp b/src/osgPlugins/zip/ZipArchive.cpp
index 02b2417dc..0a5f3e98f 100644
--- a/src/osgPlugins/zip/ZipArchive.cpp
+++ b/src/osgPlugins/zip/ZipArchive.cpp
@@ -44,6 +44,7 @@ _zipLoaded( false )
 
 ZipArchive::~ZipArchive()
 {
+    close();
 }
 
 /** close the archive (on all threads) */