1 files changed, 1 insertions, 1 deletions
diff --git a/luni/src/main/java/java/util/zip/ZipInputStream.java b/luni/src/main/java/java/util/zip/ZipInputStream.java
index d082fc7..e7c4566 100644
--- a/luni/src/main/java/java/util/zip/ZipInputStream.java
+++ b/luni/src/main/java/java/util/zip/ZipInputStream.java
@@ -101,7 +101,7 @@ public class ZipInputStream extends InflaterInputStream implements ZipConstants
     public ZipInputStream(InputStream stream) {
         super(new PushbackInputStream(stream, BUF_SIZE), new Inflater(true));
         if (stream == null) {
-            throw new NullPointerException();
+            throw new NullPointerException("stream == null");
         }
     }