diff --git a/src/Traits/Getter.php b/src/Traits/Getter.php
index cd2ce95..41f65a6 100644
--- a/src/Traits/Getter.php
+++ b/src/Traits/Getter.php
@@ -65,6 +65,11 @@ trait Getter
      */
     final public function __isset(string $property): bool
     {
-        return !empty($this->__get($property));
+        try {
+            $value = $this->__get($property);
+        } catch (\InvalidArgumentException) {
+            $value = null;
+        }
+        return !empty($value);
     }
 }
diff --git a/src/Traits/Setter.php b/src/Traits/Setter.php
index 568a639..6aa3e85 100644
--- a/src/Traits/Setter.php
+++ b/src/Traits/Setter.php
@@ -68,6 +68,8 @@ trait Setter
      */
     final public function __unset(string $property): void
     {
-        $this->__set($property, null);
+        try {
+            $this->__set($property, null);
+        } catch (\InvalidArgumentException) {}
     }
 }