diff --git a/generator/mavschema.xsd b/generator/mavschema.xsd
index 63e3342cd..c7ac1ccae 100644
--- a/generator/mavschema.xsd
+++ b/generator/mavschema.xsd
@@ -29,7 +29,8 @@
     <xs:restriction base="xs:string">
         <xs:pattern value="\d{1,20}"/> <!-- base 10 int -->
         <xs:pattern value="0[xX][0-9a-fA-F]{1,16}"/> <!-- base 16 -->
-        <xs:pattern value="0[bB][0-1]{1,64}"/> <!-- base 1 -->
+        <xs:pattern value="0[bB][0-1]{1,64}"/> <!-- base 2 -->
+        <xs:pattern value="2\*\*\d{1,2}"/> <!-- power of 2 -->
     </xs:restriction>
   </xs:simpleType>
 </xs:attribute>
@@ -38,7 +39,8 @@
     <xs:restriction base="xs:string">
         <xs:pattern value="\d{1,20}"/> <!-- base 10 int -->
         <xs:pattern value="0[xX][0-9a-fA-F]{1,16}"/> <!-- base 16 -->
-        <xs:pattern value="0[bB][0-1]{1,64}"/> <!-- base 1 -->
+        <xs:pattern value="0[bB][0-1]{1,64}"/> <!-- base 2 -->
+        <xs:pattern value="2\*\*\d{1,2}"/> <!-- power of 2 -->
         <xs:pattern value="NaN"/> <!-- Allow not-a-number as a default (for params) -->
     </xs:restriction>
   </xs:simpleType>