1 files changed, 1 insertions, 1 deletions
diff --git a/luni/src/main/java/java/security/KeyStore.java b/luni/src/main/java/java/security/KeyStore.java
index 3d856f7..5b4ff84 100644
--- a/luni/src/main/java/java/security/KeyStore.java
+++ b/luni/src/main/java/java/security/KeyStore.java
@@ -179,7 +179,7 @@ public class KeyStore {
     public static KeyStore getInstance(String type, Provider provider) throws KeyStoreException {
         // check parameters
         if (provider == null) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("provider == null");
         }
         if (type == null) {
             throw new NullPointerException("type == null");