diff --git a/README.md b/README.md
index abe8bd4..eaaf6df 100644
--- a/README.md
+++ b/README.md
@@ -282,6 +282,7 @@ Notes:
 |-----------------|---------------------|
 | `docker-digest`  | Digest of the image                                                             |
 | `docker-tag`     | Tag of the image                                                                |
+| `gitops-tag`     | Non-timestamped tag (see [GitOps tag](#gitops-tag)). Push it alongside `docker-tag` when building the image outside the action, otherwise the release retag can't find it |
 
 ## Image tags & Flux image automation
 
diff --git a/action.yml b/action.yml
index 8773078..3533865 100644
--- a/action.yml
+++ b/action.yml
@@ -135,6 +135,9 @@ outputs:
   docker-digest:
     description: 'Docker digest'
     value: ${{ steps.docker_merge.outputs.digest || steps.docker_build.outputs.digest || steps.docker_retag.outputs.digest }}
+  gitops-tag:
+    description: 'Non-timestamped tag written to the GitOps repo; push it when building outside the action so the release retag finds the image'
+    value: ${{ steps.preparation.outputs.gitops_tag }}
 
 runs:
   using: "composite"