diff --git a/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java b/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java
index 9fe0eb50188..5ef28e6f5e9 100644
--- a/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java
+++ b/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java
@@ -79,7 +79,8 @@ public class KotlinCallHierarchyNodeDescriptor extends HierarchyNodeDescriptor i
 
     @Override
     public final boolean isValid(){
-        return myElement.isValid();
+        //noinspection ConstantConditions
+        return myElement != null && myElement.isValid();
     }
 
     @Override