diff --git a/data/grampsxml.dtd b/data/grampsxml.dtd
index 200e7a3fc..1abe2cdd8 100644
--- a/data/grampsxml.dtd
+++ b/data/grampsxml.dtd
@@ -297,6 +297,7 @@ OBJECTS
 <!ATTLIST file
         src         CDATA #REQUIRED
         mime        CDATA #REQUIRED
+        checksum    CDATA #IMPLIED
         description CDATA #REQUIRED
 >
 
diff --git a/data/grampsxml.rng b/data/grampsxml.rng
index 1cc33050a..07e9e034d 100644
--- a/data/grampsxml.rng
+++ b/data/grampsxml.rng
@@ -503,6 +503,7 @@
     <element name="file">
         <attribute name="src"><text/></attribute>
         <attribute name="mime"><text/></attribute>
+        <attribute name="checksum"><text/></attribute>
         <attribute name="description"><text/></attribute>
     </element>
     <zeroOrMore><element name="attribute">