1 files changed, 1 insertions, 1 deletions
diff --git a/luni/src/main/java/java/util/zip/DeflaterInputStream.java b/luni/src/main/java/java/util/zip/DeflaterInputStream.java
index 805ce17..d854fec 100644
--- a/luni/src/main/java/java/util/zip/DeflaterInputStream.java
+++ b/luni/src/main/java/java/util/zip/DeflaterInputStream.java
@@ -78,7 +78,7 @@ public class DeflaterInputStream extends FilterInputStream {
             throw new NullPointerException("deflater == null");
         }
         if (bufferSize <= 0) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("bufferSize <= 0: " + bufferSize);
         }
         this.def = deflater;
         this.buf = new byte[bufferSize];