diff --git a/rules/DeadCode/Rector/Switch_/RemoveDuplicatedCaseInSwitchRector.php b/rules/DeadCode/Rector/Switch_/RemoveDuplicatedCaseInSwitchRector.php
index 78ec5a2fe40..7820a593660 100644
--- a/rules/DeadCode/Rector/Switch_/RemoveDuplicatedCaseInSwitchRector.php
+++ b/rules/DeadCode/Rector/Switch_/RemoveDuplicatedCaseInSwitchRector.php
@@ -150,6 +150,7 @@ private function insertCaseByKeys(Switch_ $switch, array $insertByKeys): void
         foreach ($switch->cases as $case) {
             if ($previousCase instanceof Case_ && $this->areSwitchStmtsEqualsAndWithBreak($case, $previousCase)) {
                 $previousCase->stmts = [];
+                $this->hasChanged = true;
             }
 
             $previousCase = $case;