diff --git a/src/mu-msg.c b/src/mu-msg.c
index 6883a1d5..2613f9ee 100644
--- a/src/mu-msg.c
+++ b/src/mu-msg.c
@@ -687,14 +687,15 @@ mu_msg_is_readable (MuMsg *self)
  */
 gboolean
 mu_msg_move_to_maildir (MuMsg *self, const char* targetmdir,
-			MuFlags flags, GError **err)
+			MuFlags flags, gboolean ignore_dups, GError **err)
 {
 	char *newfullpath;
 	
 	g_return_val_if_fail (self, FALSE);
 
 	newfullpath = mu_maildir_move_message (mu_msg_get_path (self),
-					       targetmdir, flags, err);
+					       targetmdir, flags,
+					       ignore_dups, err);
 	if (newfullpath) /* update our path to new one... */
 		mu_msg_cache_set_str (self->_cache, MU_MSG_FIELD_ID_PATH, newfullpath,
 				      TRUE); /* the cache will free the string */
diff --git a/src/mu-msg.h b/src/mu-msg.h
index 826fe476..3c47dc56 100644
--- a/src/mu-msg.h
+++ b/src/mu-msg.h
@@ -395,13 +395,16 @@ char* mu_msg_to_sexp (MuMsg *msg, gboolean dbonly);
  * that this may still involve a moved to another directory (say, from
  * new/ to cur/)
  * @param flags to set for the target (influences the filename, path)
+ * @param silently ignore the src=target case (return TRUE)
  * @param err (may be NULL) may contain error information; note if the
  * function return FALSE, err is not set for all error condition
- * (ie. not for parameter errors)
+ * (ie. not for parameter error
+ * 
  * @return TRUE if it worked, FALSE otherwise 
  */
 gboolean mu_msg_move_to_maildir (MuMsg *msg, const char* targetmdir,
-				 MuFlags flags, GError **err);
+				 MuFlags flags, gboolean ignore_dups,
+				 GError **err);
 
 
 enum _MuMsgContactType {  /* Reply-To:? */