diff --git a/packages/Php/src/Rector/FunctionLike/AddDefaultValueForUndefinedVariableRector.php b/packages/Php/src/Rector/FunctionLike/AddDefaultValueForUndefinedVariableRector.php
index 432d2d9023c..492ecf6b22a 100644
--- a/packages/Php/src/Rector/FunctionLike/AddDefaultValueForUndefinedVariableRector.php
+++ b/packages/Php/src/Rector/FunctionLike/AddDefaultValueForUndefinedVariableRector.php
@@ -94,7 +94,7 @@ public function refactor(Node $node): ?Node
             }
 
             $parentNode = $node->getAttribute(AttributeKey::PARENT_NODE);
-            if ($parentNode instanceof Assign) {
+            if ($parentNode instanceof Assign || $this->isStaticVariable($parentNode)) {
                 return null;
             }
 
@@ -138,4 +138,17 @@ public function refactor(Node $node): ?Node
 
         return $node;
     }
+
+    private function isStaticVariable(Node $parentNode): bool
+    {
+        // definition of static variable
+        if ($parentNode instanceof Node\Stmt\StaticVar) {
+            $parentParentNode = $parentNode->getAttribute(AttributeKey::PARENT_NODE);
+            if ($parentParentNode instanceof Node\Stmt\Static_) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }