--- a/mobile/android/stumbler/java/org/mozilla/mozstumbler/service/utils/Zipper.java
+++ b/mobile/android/stumbler/java/org/mozilla/mozstumbler/service/utils/Zipper.java
@@ -25,24 +25,34 @@ public class Zipper {
             gstream.close();
             os.close();
         }
         return output;
     }
 
     public static String unzipData(byte[] data) throws IOException {
         StringBuilder result = new StringBuilder();
+
         final ByteArrayInputStream bs = new ByteArrayInputStream(data);
-        GZIPInputStream gstream = new GZIPInputStream(bs);
+        BufferedReader in = null;
         try {
-            InputStreamReader reader = new InputStreamReader(gstream, StringUtils.UTF_8);
-            BufferedReader in = new BufferedReader(reader);
+            in = new BufferedReader(new InputStreamReader(new GZIPInputStream(bs), StringUtils.UTF_8));
             String read;
             while ((read = in.readLine()) != null) {
                 result.append(read);
             }
         } finally {
-            gstream.close();
+            // We usually use IOUtils.safeStreamClose(), however stumbler is completely independent
+            // of the rest of fennec, and hence we can't use it here:
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (IOException e) {
+                    // eat it - nothing we can do
+                }
+            }
+
+            // Is always non-null
             bs.close();
         }
         return result.toString();
     }
 }