1 files changed, 1 insertions, 1 deletions
diff --git a/luni/src/main/java/java/security/MessageDigest.java b/luni/src/main/java/java/security/MessageDigest.java
index 6f1bf21..658b41f 100644
--- a/luni/src/main/java/java/security/MessageDigest.java
+++ b/luni/src/main/java/java/security/MessageDigest.java
@@ -149,7 +149,7 @@ public abstract class MessageDigest extends MessageDigestSpi {
     public static MessageDigest getInstance(String algorithm, Provider provider)
             throws NoSuchAlgorithmException {
         if (provider == null) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("provider == null");
         }
         if (algorithm == null) {
             throw new NullPointerException("algorithm == null");