diff --git a/psalm.xml b/psalm.xml
index 51fbf4a8..50f7ed56 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -14,6 +14,11 @@
             to change this to "info".
          -->
 
+        <UndefinedFunction errorLevel="info" />
+        <!--
+            Inconsistently erroneous.
+        -->
+
         <DuplicateClass errorLevel="info" />
         <!--
             Psalm isn't correctly identifying the guard conditions that return