diff --git a/irc/dline.go b/irc/dline.go
index fb572bfb..1b37156a 100644
--- a/irc/dline.go
+++ b/irc/dline.go
@@ -298,6 +298,11 @@ func dlineHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 		return nil
 	})
 
+	if err != nil {
+		client.Notice(fmt.Sprintf("Could not successfully save new D-LINE: %s", err.Error()))
+		return false
+	}
+
 	if hostNet == nil {
 		server.dlines.AddIP(hostAddr, banTime, reason, operReason)
 	} else {
diff --git a/irc/kline.go b/irc/kline.go
index 630b6308..455c89ae 100644
--- a/irc/kline.go
+++ b/irc/kline.go
@@ -213,6 +213,11 @@ func klineHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
 		return nil
 	})
 
+	if err != nil {
+		client.Notice(fmt.Sprintf("Could not successfully save new K-LINE: %s", err.Error()))
+		return false
+	}
+
 	server.klines.AddMask(mask, banTime, reason, operReason)
 
 	if durationIsUsed {