diff --git a/platform/util/src/com/intellij/openapi/util/TextRange.java b/platform/util/src/com/intellij/openapi/util/TextRange.java
index b59c248208bf..74abaaebcd8c 100644
--- a/platform/util/src/com/intellij/openapi/util/TextRange.java
+++ b/platform/util/src/com/intellij/openapi/util/TextRange.java
@@ -18,7 +18,9 @@ package com.intellij.openapi.util;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public class TextRange implements Segment{
+import java.io.Serializable;
+
+public class TextRange implements Segment, Serializable {
   public static final TextRange EMPTY_RANGE = new TextRange(0,0);
   private final int myStartOffset;
   private final int myEndOffset;
diff --git a/platform/util/src/com/intellij/util/containers/MostlySingularMultiMap.java b/platform/util/src/com/intellij/util/containers/MostlySingularMultiMap.java
index 41f04e3b4721..c6848b3bdec1 100644
--- a/platform/util/src/com/intellij/util/containers/MostlySingularMultiMap.java
+++ b/platform/util/src/com/intellij/util/containers/MostlySingularMultiMap.java
@@ -23,12 +23,13 @@ import com.intellij.util.Processor;
 import gnu.trove.THashMap;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Map;
 import java.util.Set;
 
-public class MostlySingularMultiMap<K, V> {
+public class MostlySingularMultiMap<K, V> implements Serializable {
   private final Map<K, Object> myMap = new THashMap<K, Object>();
 
   public void add(K key, V value) {