diff --git a/psalm.xml b/psalm.xml
index 359ff53ab2..2b3b2ab3ba 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -149,6 +149,7 @@
                 <referencedMethod name="Symfony\Component\Config\Definition\Builder\VariableNodeDefinition::integerNode" />
                 <referencedMethod name="Symfony\Component\Config\Definition\Builder\VariableNodeDefinition::scalarNode" />
                 <referencedMethod name="Symfony\Component\Config\Definition\Builder\VariableNodeDefinition::variableNode" />
+                <referencedMethod name="Symfony\Component\Config\Definition\Builder\VariableNodeDefinition::scalarPrototype" />
             </errorLevel>
         </PossiblyUndefinedMethod>