diff --git a/src/conf/schemas/nodedev.rng b/src/conf/schemas/nodedev.rng
index fba4021754..ff07313968 100644
--- a/src/conf/schemas/nodedev.rng
+++ b/src/conf/schemas/nodedev.rng
@@ -869,7 +869,7 @@
 
   <define name="vpdFieldValueFormat">
     <data type="string">
-      <param name="pattern">[0-9a-zA-F -_,.:;=]{0,255}</param>
+      <param name="pattern">.{0,255}</param>
     </data>
   </define>