diff --git a/vespa-feed-client-api/abi-spec.json b/vespa-feed-client-api/abi-spec.json
index 553fa695b2f2..9a9b878d9c2a 100644
--- a/vespa-feed-client-api/abi-spec.json
+++ b/vespa-feed-client-api/abi-spec.json
@@ -332,6 +332,7 @@
       "public long responses()",
       "public long successes()",
       "public java.util.Map statsByCode()",
+      "public java.util.Optional response(int)",
       "public long exceptions()",
       "public long inflight()",
       "public long averageLatencyMillis()",