diff --git a/gio/gschema.dtd b/gio/gschema.dtd
index 8cd552d4a..1599f8de7 100644
--- a/gio/gschema.dtd
+++ b/gio/gschema.dtd
@@ -49,8 +49,8 @@
 <!ELEMENT range EMPTY >
 <!-- min and max must be parseable as values of the key type and
      min must be less than or equal to max -->
-<!ATTLIST range min CDATA #REQUIRED
-                max CDATA #REQUIRED >
+<!ATTLIST range min CDATA #IMPLIED
+                max CDATA #IMPLIED >
 
 <!-- choices is only allowed for keys with string or string array type -->
 <!ELEMENT choices (choice+) >