diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index c742899cb2a0..bc3d533d251d 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1821,10 +1821,8 @@ static const char *hist_field_name(struct hist_field *field,
 			len = snprintf(full_name, sizeof(full_name), "%s.%s.%s",
 				       field->system, field->event_name,
 				       field->name);
-			if (len >= sizeof(full_name))
-				return NULL;
-
-			field_name = full_name;
+			if (len < sizeof(full_name))
+				field_name = full_name;
 		} else
 			field_name = field->name;
 	} else if (field->flags & HIST_FIELD_FL_TIMESTAMP)