diff --git a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Util.java b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Util.java
index e6a7713..4cf4d64 100644
--- a/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Util.java
+++ b/fileinstall/src/main/java/org/apache/felix/fileinstall/internal/Util.java
@@ -34,6 +34,7 @@
 import java.util.Set;
 import java.util.jar.JarFile;
 import java.util.jar.JarOutputStream;
+import java.util.zip.Deflater;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
@@ -203,6 +204,7 @@
     {
         // create a ZipOutputStream to zip the data to
         JarOutputStream zos = new JarOutputStream(os);
+        zos.setLevel(Deflater.NO_COMPRESSION);
         String path = "";
         File manFile = new File(directory, JarFile.MANIFEST_NAME);
         if (manFile.exists())