diff --git a/platform/util/src/com/intellij/util/SmartList.java b/platform/util/src/com/intellij/util/SmartList.java
index 775b63e8e887..21bcd4978d5c 100644
--- a/platform/util/src/com/intellij/util/SmartList.java
+++ b/platform/util/src/com/intellij/util/SmartList.java
@@ -27,7 +27,7 @@ import java.util.*;
  * in which cases it would not allocate array at all.
  */
 @SuppressWarnings({"unchecked"})
-public class SmartList<E> extends AbstractList<E> {
+public class SmartList<E> extends AbstractList<E> implements RandomAccess {
   private int mySize = 0;
   private Object myElem = null; // null if mySize==0, (E)elem if mySize==1, Object[] if mySize>=2