diff --git a/processing/src/main/java/io/druid/query/timeboundary/TimeBoundaryQuery.java b/processing/src/main/java/io/druid/query/timeboundary/TimeBoundaryQuery.java
index db9fa913bc9..5aae5d9fc67 100644
--- a/processing/src/main/java/io/druid/query/timeboundary/TimeBoundaryQuery.java
+++ b/processing/src/main/java/io/druid/query/timeboundary/TimeBoundaryQuery.java
@@ -199,7 +199,7 @@ public class TimeBoundaryQuery extends BaseQuery<Result<TimeBoundaryResultValue>
            "dataSource='" + getDataSource() + '\'' +
            ", querySegmentSpec=" + getQuerySegmentSpec() +
            ", duration=" + getDuration() +
-           ", bound" + bound +
+           ", bound=" + bound +
            '}';
   }