diff --git a/docs/release-notes/change-log.md b/docs/release-notes/change-log.md
index 7dd49cf1b..7b955b39f 100644
--- a/docs/release-notes/change-log.md
+++ b/docs/release-notes/change-log.md
@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Fixed
 * Fixed metrics for time spent in eth_calls within modules stats (server and GUI)
+* Fixed `undo` json message
 
 ## v1.1.18
 
diff --git a/tui/print.go b/tui/print.go
index c3c0a5880..84bc6132e 100644
--- a/tui/print.go
+++ b/tui/print.go
@@ -365,5 +365,5 @@ func printUndo(lastGoodClock *pbsubstreams.BlockRef, cursor string) {
 	fmt.Printf("\nNext cursor: %s\n", cursor)
 }
 func printUndoJSON(lastGoodClock *pbsubstreams.BlockRef, cursor string) {
-	fmt.Printf("{\"undo_until\":{\"num\":%d,\"id\":%s\",\"next_cursor\":\"%s\"}\n", lastGoodClock.Number, lastGoodClock.Id, cursor)
+	fmt.Printf("{\"undo_until\":{\"num\":%d,\"id\":%s\",\"next_cursor\":\"%s\"}}\n", lastGoodClock.Number, lastGoodClock.Id, cursor)
 }