diff --git a/docs/reference/compose_build.md b/docs/reference/compose_build.md
index a0ceb050c0..271dfcde7b 100644
--- a/docs/reference/compose_build.md
+++ b/docs/reference/compose_build.md
@@ -23,7 +23,7 @@ Build or rebuild services
 
 ## Description
 
-Services are built once and then tagged, by default as `project_service`.
+Services are built once and then tagged, by default as `project-service`.
 
 If the Compose file specifies an
 [image](https://github.com/compose-spec/compose-spec/blob/master/spec.md#image) name,
diff --git a/docs/reference/docker_compose_build.yaml b/docs/reference/docker_compose_build.yaml
index 34175696fb..1c7c2ecd9e 100644
--- a/docs/reference/docker_compose_build.yaml
+++ b/docs/reference/docker_compose_build.yaml
@@ -1,7 +1,7 @@
 command: docker compose build
 short: Build or rebuild services
 long: |-
-    Services are built once and then tagged, by default as `project_service`.
+    Services are built once and then tagged, by default as `project-service`.
 
     If the Compose file specifies an
     [image](https://github.com/compose-spec/compose-spec/blob/master/spec.md#image) name,