diff --git a/java/debugger/impl/src/com/intellij/debugger/engine/JVMNameUtil.java b/java/debugger/impl/src/com/intellij/debugger/engine/JVMNameUtil.java
index 04694c844592..cf1c7c2b5c64 100644
--- a/java/debugger/impl/src/com/intellij/debugger/engine/JVMNameUtil.java
+++ b/java/debugger/impl/src/com/intellij/debugger/engine/JVMNameUtil.java
@@ -248,7 +248,7 @@ public class JVMNameUtil {
     }
   }
                                
-  public static JVMName getJVMQualifiedName(PsiClass psiClass) {
+  public static JVMName getJVMQualifiedName(@NotNull PsiClass psiClass) {
     final String name = getNonAnonymousClassName(psiClass);
     if (name != null) {
       return getJVMRawText(name);