diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index a3eae5c1344a..91a550411e8a 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1754,6 +1754,9 @@ static bool expr_field_str(struct hist_field *field, struct seq_buf *s)
 			seq_buf_printf(s, ".%s", flags_str);
 	}
 
+	if (field->buckets)
+		seq_buf_printf(s, "=%lu", field->buckets);
+
 	return !seq_buf_has_overflowed(s);
 }