diff --git a/demo/auto/AutoValue_Address.php b/demo/auto/AutoValue_Address.php
index 23f668c..89e67d4 100644
--- a/demo/auto/AutoValue_Address.php
+++ b/demo/auto/AutoValue_Address.php
@@ -108,10 +108,7 @@ public function foo()
 
     public function linesString(): string
     {
-        if (!isset($this->__memoized['linesString'])) {
-            $this->__memoized['linesString'] = parent::linesString();
-        }
-        return $this->__memoized['linesString'];
+        return $this->__memoized['linesString'] ?? ($this->__memoized['linesString'] = parent::linesString());
     }
 
     /**
diff --git a/src/Memoize/MemoizeMethodProcessor.php b/src/Memoize/MemoizeMethodProcessor.php
index fdde541..0549210 100644
--- a/src/Memoize/MemoizeMethodProcessor.php
+++ b/src/Memoize/MemoizeMethodProcessor.php
@@ -42,10 +42,7 @@ function (MethodDefinitionCollection $methodDefinitions, ReflectionMethod $metho
 THEPHP;
                 } else {
                     $methodBody = <<<THEPHP
-        if (!isset(\$this->__memoized['$methodName'])) {
-            \$this->__memoized['$methodName'] = parent::$methodName();
-        }
-        return \$this->__memoized['$methodName'];
+        return \$this->__memoized['$methodName'] ?? (\$this->__memoized['$methodName'] = parent::$methodName());
 THEPHP;
                 }
                 return $methodDefinitions->withAdditionalMethodDefinition(MethodDefinition::of($method, $methodBody));