diff --git a/drafts/v2.1/ComicInfo.xsd b/drafts/v2.1/ComicInfo.xsd
index 689f33b..c44a561 100644
--- a/drafts/v2.1/ComicInfo.xsd
+++ b/drafts/v2.1/ComicInfo.xsd
@@ -78,7 +78,7 @@
             <xs:enumeration value="G" />
             <xs:enumeration value="Kids to Adults" />
             <xs:enumeration value="M" />
-            <xs:enumeration value="MA 15+" />
+            <xs:enumeration value="MA15+" />
             <xs:enumeration value="Mature 17+" />
             <xs:enumeration value="PG" />
             <xs:enumeration value="R18+" />
diff --git a/schema/v2.0/ComicInfo.xsd b/schema/v2.0/ComicInfo.xsd
index a46241c..244a989 100644
--- a/schema/v2.0/ComicInfo.xsd
+++ b/schema/v2.0/ComicInfo.xsd
@@ -75,7 +75,7 @@
             <xs:enumeration value="G" />
             <xs:enumeration value="Kids to Adults" />
             <xs:enumeration value="M" />
-            <xs:enumeration value="MA 15+" />
+            <xs:enumeration value="MA15+" />
             <xs:enumeration value="Mature 17+" />
             <xs:enumeration value="PG" />
             <xs:enumeration value="R18+" />