diff --git a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/FoldingUtil.java b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/FoldingUtil.java
index c84781ab36c3..3baa8db88bd5 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/FoldingUtil.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/folding/impl/FoldingUtil.java
@@ -119,6 +119,11 @@ public class FoldingUtil {
         }
         return allRegions[--current];
       }
+
+      @Override
+      public void remove() {
+        throw new UnsupportedOperationException();
+      }
     };
   }