diff --git a/src/NodeManipulator/ClassDependencyManipulator.php b/src/NodeManipulator/ClassDependencyManipulator.php
index 61e43fb1730..9125a347977 100644
--- a/src/NodeManipulator/ClassDependencyManipulator.php
+++ b/src/NodeManipulator/ClassDependencyManipulator.php
@@ -4,11 +4,13 @@
 
 namespace Rector\NodeManipulator;
 
+use PhpParser\Modifiers;
 use PhpParser\Node\Arg;
 use PhpParser\Node\Expr\Assign;
 use PhpParser\Node\Expr\StaticCall;
 use PhpParser\Node\Expr\Variable;
 use PhpParser\Node\Name;
+use PhpParser\Node\Param;
 use PhpParser\Node\Stmt;
 use PhpParser\Node\Stmt\Class_;
 use PhpParser\Node\Stmt\ClassLike;
@@ -248,13 +250,31 @@ private function addPromotedProperty(
         $param = $this->nodeFactory->createPromotedPropertyParam($propertyMetadata);
 
         if ($constructClassMethod instanceof ClassMethod) {
-            // parameter is already added
-            if ($this->hasMethodParameter($constructClassMethod, $propertyMetadata->getName())) {
+            $hasOwnConstruct = $class->getMethod(MethodName::CONSTRUCT) instanceof ClassMethod;
+            $matchedParam = $this->matchMethodParameter($constructClassMethod, $propertyMetadata->getName());
+
+            if ($matchedParam instanceof Param) {
+                // own constructor already has this param → nothing to do
+                if ($hasOwnConstruct) {
+                    return;
+                }
+
+                // parent constructor has a same-named param; if it is a private promoted
+                // property, the child cannot access it via $this — add a fresh constructor
+                // on the child instead of trying to extend the parent signature
+                if (($matchedParam->flags & Modifiers::PRIVATE) !== 0) {
+                    $childConstructClassMethod = $this->nodeFactory->createPublicMethod(MethodName::CONSTRUCT);
+                    $childConstructClassMethod->params[] = $param;
+                    $this->classInsertManipulator->addAsFirstMethod($class, $childConstructClassMethod);
+                    return;
+                }
+
+                // parent's matching param is protected/public — accessible from child, no add needed
                 return;
             }
 
             // found construct, but only on parent, add to current class
-            if (! $class->getMethod(MethodName::CONSTRUCT) instanceof ClassMethod) {
+            if (! $hasOwnConstruct) {
                 $parentArgs = [];
 
                 foreach ($constructClassMethod->params as $originalParam) {
@@ -334,15 +354,15 @@ private function hasClassPropertyAndDependency(Class_ $class, PropertyMetadata $
         return $property instanceof Property;
     }
 
-    private function hasMethodParameter(ClassMethod $classMethod, string $name): bool
+    private function matchMethodParameter(ClassMethod $classMethod, string $name): ?Param
     {
         foreach ($classMethod->params as $param) {
             if ($this->nodeNameResolver->isName($param->var, $name)) {
-                return true;
+                return $param;
             }
         }
 
-        return false;
+        return null;
     }
 
     private function shouldAddPromotedProperty(Class_ $class, PropertyMetadata $propertyMetadata): bool