diff --git a/SoObjects/Mailer/SOGoMailObject.h b/SoObjects/Mailer/SOGoMailObject.h
index e5fc99319..c28e28239 100644
--- a/SoObjects/Mailer/SOGoMailObject.h
+++ b/SoObjects/Mailer/SOGoMailObject.h
@@ -82,6 +82,7 @@
 
 - (NSData *) content;
 - (NSString *) contentAsString;
+- (NSString *) davContentLength;
 
 - (NSString *) cc;
 - (NSString *) from;