diff --git a/Classes/LinphoneUI/UIHistoryCell.m b/Classes/LinphoneUI/UIHistoryCell.m
index 346c029c6..eb930d867 100644
--- a/Classes/LinphoneUI/UIHistoryCell.m
+++ b/Classes/LinphoneUI/UIHistoryCell.m
@@ -91,7 +91,7 @@
 	// Set up the cell...
 	if (linphone_call_log_was_conference(callLog)) {
 		const char *subject = linphone_conference_info_get_subject(linphone_call_log_get_conference_info(callLog));
-		displayNameLabel.text = [NSString stringWithFormat:@"%s",subject];
+		displayNameLabel.text = [NSString stringWithUTF8String:subject];
 		[_avatarImage setImage:[UIImage imageNamed:@"voip_multiple_contacts_avatar"]];
 		_stateImage.hidden = true;
 	} else {