diff --git a/docker/manifest.rootless.tmpl b/docker/manifest.rootless.tmpl
index 46a397c828d89..ef48dd1684b0a 100644
--- a/docker/manifest.rootless.tmpl
+++ b/docker/manifest.rootless.tmpl
@@ -1,6 +1,6 @@
 image: gitea/gitea:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}{{#if (hasPrefix "refs/heads/release/v" build.ref)}}{{trimPrefix "refs/heads/release/v" build.ref}}-{{/if}}dev{{/if}}-rootless
 {{#if build.tags}}
-{{#unless contains "-rc" build.tag}}
+{{#unless (contains "-rc" build.tag)}}
 tags:
 {{#each build.tags}}
   - {{this}}-rootless
diff --git a/docker/manifest.tmpl b/docker/manifest.tmpl
index b4ba5a76ed4aa..018d87e9796b0 100644
--- a/docker/manifest.tmpl
+++ b/docker/manifest.tmpl
@@ -1,6 +1,6 @@
 image: gitea/gitea:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}{{#if (hasPrefix "refs/heads/release/v" build.ref)}}{{trimPrefix "refs/heads/release/v" build.ref}}-{{/if}}dev{{/if}}
 {{#if build.tags}}
-{{#unless contains "-rc" build.tag }}
+{{#unless (contains "-rc" build.tag)}}
 tags:
 {{#each build.tags}}
   - {{this}}