diff --git a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
index e03ad8f52766..1bfc71009002 100644
--- a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
+++ b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
@@ -528,7 +528,7 @@ public class ShowUsagesAction extends AnAction {
       }
 
       public int getColumnCount() {
-        return data.get(0) instanceof UsageNode ? 3 : 1;
+        return !data.isEmpty() && data.get(0) instanceof UsageNode ? 3 : 1;
       }
 
       public Object getValueAt(int rowIndex, int columnIndex) {