diff --git a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
index 45a5535097bb..6c1f6c369be9 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightUtil.java
@@ -988,6 +988,11 @@ public class HighlightUtil {
           isAllowed &= !privateOrProtected;
         }
       }
+      if (PsiModifier.NON_SEALED.equals(modifier) && !aClass.hasModifierProperty(PsiModifier.SEALED)) {
+        isAllowed = Arrays.stream(aClass.getSuperTypes())
+          .map(PsiClassType::resolve)
+          .anyMatch(superClass -> superClass != null && superClass.hasModifierProperty(PsiModifier.SEALED));
+      }
     }
     else if (modifierOwner instanceof PsiMethod) {
       PsiMethod method = (PsiMethod)modifierOwner;
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlightingSealedTypes/SealedTypesBasics.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlightingSealedTypes/SealedTypesBasics.java
index 43a98903a8d5..58c1bdbcb5fe 100644
--- a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlightingSealedTypes/SealedTypesBasics.java
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlightingSealedTypes/SealedTypesBasics.java
@@ -13,3 +13,7 @@ sealed interface IA permits IB, IC {}
 final class IB implements IA {}
 sealed interface IC extends IA {}
 class ICSameFile implements IC {}
+
+sealed interface ID0 {}
+non-sealed interface ID1 extends ID0 {}
+<error descr="Modifier 'non-sealed' not allowed here">non-sealed</error> interface ID extends ID1 {}