1 files changed, 2 insertions, 2 deletions
diff --git a/luni/src/main/java/java/nio/LongBuffer.java b/luni/src/main/java/java/nio/LongBuffer.java
index 27edd2e..1254ddb 100644
--- a/luni/src/main/java/java/nio/LongBuffer.java
+++ b/luni/src/main/java/java/nio/LongBuffer.java
@@ -46,7 +46,7 @@ public abstract class LongBuffer extends Buffer implements
      */
     public static LongBuffer allocate(int capacity) {
         if (capacity < 0) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("capacity < 0: " + capacity);
         }
         return new ReadWriteLongArrayBuffer(capacity);
     }
@@ -427,7 +427,7 @@ public abstract class LongBuffer extends Buffer implements
      */
     public LongBuffer put(LongBuffer src) {
         if (src == this) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("src == this");
         }
         if (src.remaining() > remaining()) {
             throw new BufferOverflowException();