diff --git a/gson/src/main/java/com/google/gson/stream/MalformedJsonException.java b/gson/src/main/java/com/google/gson/stream/MalformedJsonException.java
index c7d39c17..9da70ebc 100644
--- a/gson/src/main/java/com/google/gson/stream/MalformedJsonException.java
+++ b/gson/src/main/java/com/google/gson/stream/MalformedJsonException.java
@@ -31,6 +31,8 @@ public final class MalformedJsonException extends IOException {
 
   public MalformedJsonException(String msg, Throwable throwable) {
     super(msg);
+    // Using initCause() instead of calling super() because Java 1.5 didn't retrofit IOException
+    // with a constructor with Throwable. This was done in Java 1.6
     initCause(throwable);
   }