diff --git a/java/compiler/impl/src/com/intellij/compiler/options/AnnotationProcessorsConfigurable.java b/java/compiler/impl/src/com/intellij/compiler/options/AnnotationProcessorsConfigurable.java
index 74ed9e1ae075..934f83db31ea 100644
--- a/java/compiler/impl/src/com/intellij/compiler/options/AnnotationProcessorsConfigurable.java
+++ b/java/compiler/impl/src/com/intellij/compiler/options/AnnotationProcessorsConfigurable.java
@@ -100,6 +100,7 @@ public class AnnotationProcessorsConfigurable implements SearchableConfigurable,
   }
 
   public void disposeUIResources() {
+    myMainPanel = null;
   }
 
 }