diff --git a/platform/lang-api/src/com/intellij/codeInsight/daemon/MergeableLineMarkerInfo.java b/platform/lang-api/src/com/intellij/codeInsight/daemon/MergeableLineMarkerInfo.java
index 58c96a69cafe..f9d8554094bf 100644
--- a/platform/lang-api/src/com/intellij/codeInsight/daemon/MergeableLineMarkerInfo.java
+++ b/platform/lang-api/src/com/intellij/codeInsight/daemon/MergeableLineMarkerInfo.java
@@ -27,6 +27,7 @@ import com.intellij.ui.components.JBLabel;
 import com.intellij.ui.components.JBList;
 import com.intellij.util.Function;
 import com.intellij.util.SmartList;
+import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.ui.JBUI;
 import com.intellij.util.ui.UIUtil;
 import com.intellij.xml.util.XmlStringUtil;