diff --git a/src/Naneau/Obfuscator/Node/Visitor/ScrambleUse.php b/src/Naneau/Obfuscator/Node/Visitor/ScrambleUse.php
index b95bd64..a1f4609 100644
--- a/src/Naneau/Obfuscator/Node/Visitor/ScrambleUse.php
+++ b/src/Naneau/Obfuscator/Node/Visitor/ScrambleUse.php
@@ -123,6 +123,39 @@ public function enterNode(Node $node)
             return $node;
         }
 
+        if ($node instanceof Node\Stmt\ClassMethod) {
+
+            if ($node->returnType instanceof Name) {
+                // Name
+                $name = $node->returnType->toString();
+
+                // Has it been renamed?
+                if ($this->isRenamed($name)) {
+                    $node->returnType = $this->getNewName($name);
+                    return $node;
+                } elseif ($this->isRenamed($node->returnType->getFirst())) {
+                    reset($node->returnType->parts);
+                    $node->returnType->parts[key($node->returnType->parts)] = $this->getNewName($node->returnType->getFirst());
+                    return $node;
+                }
+            }
+
+            if ($node->returnType instanceof Node\NullableType && $node->returnType->type instanceof Name) {
+                // Name
+                $name = $node->returnType->type->toString();
+
+                // Has it been renamed?
+                if ($this->isRenamed($name)) {
+                    $node->returnType->type = $this->getNewName($name);
+                    return $node;
+                } elseif ($this->isRenamed($node->returnType->type->getFirst())) {
+                    reset($node->returnType->type->parts);
+                    $node->returnType->type->parts[key($node->returnType->type->parts)] = $this->getNewName($node->returnType->type->getFirst());
+                    return $node;
+                }
+            }
+        }
+
         // Param rename
         if ($node instanceof Param && $node->type instanceof Name) {
 
diff --git a/tests/before/Namespaces.php b/tests/before/Namespaces.php
index 13248d0..48d8116 100644
--- a/tests/before/Namespaces.php
+++ b/tests/before/Namespaces.php
@@ -35,7 +35,7 @@ public function __construct() {
 
 class classE extends namespaceDAlias\classD implements namespaceDAlias\interfaceA {
 
-    public function method(namespaceDAlias\classD $objectD) {
+    public function method(namespaceDAlias\classD $objectD) : ?namespaceDAlias\classD {
 
     }
 }
\ No newline at end of file
diff --git a/tests/expected/Namespaces.php b/tests/expected/Namespaces.php
index dd690db..5ee9558 100644
--- a/tests/expected/Namespaces.php
+++ b/tests/expected/Namespaces.php
@@ -1,2 +1,2 @@
 <?php
-namespace namespaceA; class classA { } namespace namespaceC\namespaceD; class classD { } interface interfaceA { } namespace namespaceB; use namespaceA\classA as spf0f507; use namespaceC\namespaceD as sp63627e; class classB { private $spa26210; private $sp2e1034; public function __construct() { $this->spa26210 = new spf0f507(); $this->sp2e1034 = new sp63627e\classD(); } } class classE extends sp63627e\classD implements sp63627e\interfaceA { public function method(sp63627e\classD $spc1ac55) { } }
\ No newline at end of file
+namespace namespaceA; class classA { } namespace namespaceC\namespaceD; class classD { } interface interfaceA { } namespace namespaceB; use namespaceA\classA as spf0f507; use namespaceC\namespaceD as sp63627e; class classB { private $spa26210; private $sp2e1034; public function __construct() { $this->spa26210 = new spf0f507(); $this->sp2e1034 = new sp63627e\classD(); } } class classE extends sp63627e\classD implements sp63627e\interfaceA { public function method(sp63627e\classD $spc1ac55) : ?sp63627e\classD { } }
\ No newline at end of file