diff --git a/phpunit/code/trait-aliased-constructor-parent-call.php b/phpunit/code/trait-aliased-constructor-parent-call.php
new file mode 100644
index 00000000..42cd4a40
--- /dev/null
+++ b/phpunit/code/trait-aliased-constructor-parent-call.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+class Base
+{
+    public function __construct(array $option = [])
+    {
+        echo 'Base:';
+        foreach ($option as $k => $v) {
+            echo ' ' . $k . '=' . $v;
+        }
+        echo "\n";
+    }
+}
+
+trait TPdoDriver
+{
+    public function __construct(array $option = [])
+    {
+        $option['fromTrait'] = 1;
+        parent::__construct($option);
+    }
+}
+
+class Driver extends Base
+{
+    use TPdoDriver {
+        __construct as private tPdoDriverConstruct;
+    }
+
+    public function __construct(array $option = [])
+    {
+        $option['username'] = 'postgres';
+        $this->tPdoDriverConstruct($option);
+    }
+}
+
+class DirectDriver extends Base
+{
+    use TPdoDriver;
+}
diff --git a/phpunit/src/TraitFuncDeclTest.php b/phpunit/src/TraitFuncDeclTest.php
new file mode 100644
index 00000000..4d5129e6
--- /dev/null
+++ b/phpunit/src/TraitFuncDeclTest.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Regression test for the trait `parent::` / `trait_parent_ce` declaration bug.
+ *
+ * A trait method whose body contains `parent::` calls is compiled with an implicit
+ * `zend_class_entry *trait_parent_ce` parameter (so `parent::` can be bound to the
+ * class that composes the trait). The shared `func_decl.h` declaration must emit the
+ * same parameter; otherwise the generated C++ fails to compile with C2660
+ * ("function does not accept 3 arguments") at the call site that forwards to the trait
+ * function. This is a code-generation-level check that fails before the fix and passes
+ * after it.
+ */
+class TraitFuncDeclTest extends \BaseTest
+{
+    public function testAliasedTraitConstructorParentCallDeclaresTraitParentCe(): void
+    {
+        // BaseTest::compile() populates the global $translator and translates the file.
+        $this->compile('trait-aliased-constructor-parent-call.php');
+
+        global $translator;
+        $compiler = $translator;
+
+        $headerPath = $compiler->getIncludeDir() . '/php_trait_parent_ce_func_decl.h';
+        if (file_exists($headerPath)) {
+            @unlink($headerPath);
+        }
+        // Emit the shared function-declaration header (genFunctionDeclarations), which
+        // is what the fix targets.
+        $compiler->genFunctionDeclarations($headerPath);
+
+        $decl = file_get_contents($headerPath);
+        $this->assertMatchesRegularExpression(
+            '/extern void php_tpdodriver____construct\([^;\n]*trait_parent_ce[^;\n]*\);/',
+            $decl,
+            'The trait function declaration must include its implicit parent scope'
+        );
+        $this->assertDoesNotMatchRegularExpression(
+            '/extern void php_(?:driver__tpdodriverconstruct|directdriver____construct)'
+                . '\([^;\n]*trait_parent_ce[^;\n]*\);/',
+            $decl,
+            'Composing-class wrapper declarations must not expose the implicit parent scope'
+        );
+    }
+}
diff --git a/src/Entity/FunctionDef.php b/src/Entity/FunctionDef.php
index 028b69f9..1b9f344c 100644
--- a/src/Entity/FunctionDef.php
+++ b/src/Entity/FunctionDef.php
@@ -33,6 +33,8 @@ class FunctionDef
     public string $attributeFactoryScope = '';
     /** External library imported by the stub containing this function. */
     public string $importLibrary = '';
+    /** Whether the native signature includes an implicit trait parent scope. */
+    public bool $hasTraitParentCeParameter = false;
     public bool $returnTypeUndeclared = false;
     public bool $returnsByRef = false;
     public bool $generator = false;
diff --git a/src/Translator.php b/src/Translator.php
index 66568139..34e16a90 100644
--- a/src/Translator.php
+++ b/src/Translator.php
@@ -1602,6 +1602,9 @@ CODE;
             $list = [];
             if ($func->method) {
                 $list[] = Type::OBJECT . ' &this_';
+                if ($func->hasTraitParentCeParameter) {
+                    $list[] = 'zend_class_entry *trait_parent_ce';
+                }
             }
             $argInfoList = $func->argInfoList;
             if ($argInfoList) {
@@ -3459,12 +3462,14 @@ CODE;
         $cppReturnType = $multiReturn
             ? $this->functionDef->getMultiReturnCppType()
             : ($this->functionDef->returnsByRef ? Type::REF : $this->getReturnType());
+        $this->functionDef->hasTraitParentCeParameter =
+            $this->classDef?->trait !== null && (bool) $this->methodDef?->parentMethodCalls;
         $nativeName = self::PREFIX . $name;
         $functionAttribute = $this->getFunctionOptimizationAttribute($this->functionDef);
         $functionDeclCode = $functionAttribute . $cppReturnType . ' ' . ($multiReturn ? $this->getMultiReturnImplName($name) : $nativeName) . '(';
         if ($this->class) {
             $functionDeclCode .= Type::OBJECT . ' &this_';
-            if ($this->classDef?->trait !== null && $this->methodDef?->parentMethodCalls) {
+            if ($this->functionDef->hasTraitParentCeParameter) {
                 $functionDeclCode .= ', zend_class_entry *trait_parent_ce';
             }
             if ($this->functionDef->params) {
@@ -4462,6 +4467,10 @@ CODE;
         string $traitMethodName,
         string $classMethodName
     ): string {
+        // A trait may be composed by multiple classes and aliases. Each wrapper
+        // needs independent signature metadata.
+        $methodDef = clone $methodDef;
+
         // A trait method's `self`/`static`/`parent` return and parameter types
         // refer to the class that uses the trait, not the trait itself. Re-resolve
         // them to the consuming class so signature-compatibility checks (against
@@ -4470,6 +4479,10 @@ CODE;
         // function untouched.
         $this->reresolveTraitLateBoundTypes($classDef, $methodDef);
 
+        // The wrapper computes the composing class's parent scope and passes it
+        // to the trait function; it does not expose that scope in its signature.
+        $methodDef->functionDef->hasTraitParentCeParameter = false;
+
         // Validate `parent::` calls emitted from this trait method against the
         // parent of the class that is composing the trait. The trait itself has
         // no parent at compile time, so this is the only place the parent class
@@ -4540,28 +4553,8 @@ CODE;
     private function reresolveTraitLateBoundTypes(ClassDef $usingClassDef, MethodDef $methodDef): void
     {
         $fn = $methodDef->functionDef;
-        $needsClone = false;
-
-        if ($fn->returnTypeKeyword !== '') {
-            $resolved = $this->resolveLateBoundClass($usingClassDef, $fn->returnTypeKeyword);
-            if ($resolved !== null && $resolved !== $fn->returnClass) {
-                $needsClone = true;
-            }
-        }
-        foreach ($fn->argInfoList as $arg) {
-            if ($arg->typeKeyword !== '') {
-                $resolved = $this->resolveLateBoundClass($usingClassDef, $arg->typeKeyword);
-                if ($resolved !== null && ($resolved !== $arg->class || $resolved !== $arg->declaredClass)) {
-                    $needsClone = true;
-                    break;
-                }
-            }
-        }
-
-        if (!$needsClone) {
-            return;
-        }
-
+        // Always produce a distinct FunctionDef for the composing-class wrapper.
+        // The wrapper has a separate native signature from the trait function.
         $newFn = clone $fn;
         if ($fn->returnTypeKeyword !== '') {
             $resolved = $this->resolveLateBoundClass($usingClassDef, $fn->returnTypeKeyword);
diff --git a/tests/compiler/trait/trait-aliased-constructor-parent-call.phpt b/tests/compiler/trait/trait-aliased-constructor-parent-call.phpt
new file mode 100644
index 00000000..2547e0ef
--- /dev/null
+++ b/tests/compiler/trait/trait-aliased-constructor-parent-call.phpt
@@ -0,0 +1,61 @@
+--TEST--
+Trait parent constructor calls keep declarations aligned for aliased and direct wrappers
+--FILE--
+<?php
+
+class Base
+{
+    public function __construct(array $options = [])
+    {
+        var_dump($options);
+    }
+}
+
+trait DriverConstructor
+{
+    public function __construct(array $options = [])
+    {
+        $options['trait'] = 1;
+        parent::__construct($options);
+    }
+}
+
+class AliasedDriver extends Base
+{
+    use DriverConstructor {
+        __construct as private traitConstruct;
+    }
+
+    public function __construct(array $options = [])
+    {
+        $options['alias'] = 1;
+        $this->traitConstruct($options);
+    }
+}
+
+class DirectDriver extends Base
+{
+    use DriverConstructor;
+}
+
+function main()
+{
+    new AliasedDriver(['input' => 1]);
+    new DirectDriver(['direct' => 1]);
+}
+?>
+--EXPECT--
+array(3) {
+  ["input"]=>
+  int(1)
+  ["alias"]=>
+  int(1)
+  ["trait"]=>
+  int(1)
+}
+array(2) {
+  ["direct"]=>
+  int(1)
+  ["trait"]=>
+  int(1)
+}