diff --git a/java-analysis-impl/src/main/java/com/intellij/java/analysis/impl/codeInspection/dataFlow/DataFlowInspectionBase.java b/java-analysis-impl/src/main/java/com/intellij/java/analysis/impl/codeInspection/dataFlow/DataFlowInspectionBase.java
index e675fccd5..19504bc89 100644
--- a/java-analysis-impl/src/main/java/com/intellij/java/analysis/impl/codeInspection/dataFlow/DataFlowInspectionBase.java
+++ b/java-analysis-impl/src/main/java/com/intellij/java/analysis/impl/codeInspection/dataFlow/DataFlowInspectionBase.java
@@ -659,11 +659,12 @@ private void reportMutabilityViolations(ProblemsHolder holder, Set<PsiElement> v
         for (PsiElement violation : violations) {
             holder.newProblem(message)
                 .range(violation)
-                .withFix(createMutabilityViolationFix(violation, holder.isOnTheFly()))
+                .withOptionalFix(createMutabilityViolationFix(violation, holder.isOnTheFly()))
                 .create();
         }
     }
 
+    @Nullable
     protected LocalQuickFix createMutabilityViolationFix(PsiElement violation, boolean onTheFly) {
         return null;
     }