diff --git a/rules-tests/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector/Fixture/skip_simple_xml_element.php.inc b/rules-tests/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector/Fixture/skip_simple_xml_element.php.inc
new file mode 100644
index 00000000000..7c51e90b85d
--- /dev/null
+++ b/rules-tests/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector/Fixture/skip_simple_xml_element.php.inc
@@ -0,0 +1,18 @@
+<?php
+
+namespace Rector\Tests\CodeQuality\Rector\Isset_\IssetOnPropertyObjectToPropertyExistsRector\Fixture;
+
+use SimpleXMLElement;
+
+final class SkipSimpleXmlElement
+{
+    public function x(SimpleXMLElement $svg) {
+        $svgAttributes = $svg->attributes();
+
+        if (isset($svgAttributes->width) && isset($svgAttributes->height)) {
+            return true;
+        }
+
+        return isset($svg->viewBox);
+    }
+}
diff --git a/rules/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector.php b/rules/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector.php
index 52f0b4374b1..5e68aeb0945 100644
--- a/rules/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector.php
+++ b/rules/CodeQuality/Rector/Isset_/IssetOnPropertyObjectToPropertyExistsRector.php
@@ -221,6 +221,13 @@ private function matchPropertyTypeClassReflection(PropertyFetch $propertyFetch):
             return null;
         }
 
-        return $this->reflectionProvider->getClass($className);
+        $classReflection = $this->reflectionProvider->getClass($className);
+
+        // XML elements resolve properties from the XML document itself
+        if ($classReflection->is('SimpleXMLElement')) {
+            return null;
+        }
+
+        return $classReflection;
     }
 }