diff --git a/platform/lang-impl/src/com/intellij/codeInsight/completion/impl/CamelHumpMatcher.java b/platform/lang-impl/src/com/intellij/codeInsight/completion/impl/CamelHumpMatcher.java
index 9fc55743281d..9455243efd0f 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/completion/impl/CamelHumpMatcher.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/completion/impl/CamelHumpMatcher.java
@@ -1,3 +1,4 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.codeInsight.completion.impl;
 
 import com.intellij.codeInsight.CodeInsightSettings;
@@ -164,6 +165,7 @@ public class CamelHumpMatcher extends PrefixMatcher {
     return matchingDegree(string, matchingFragments(string));
   }
 
+  @Nullable
   public FList<TextRange> matchingFragments(String string) {
     return myMatcher.matchingFragments(string);
   }