diff --git a/compose/compose-file/compose-file-v1.md b/compose/compose-file/compose-file-v1.md
index 7e0ede1bc1..9e5c1ac1de 100644
--- a/compose/compose-file/compose-file-v1.md
+++ b/compose/compose-file/compose-file-v1.md
@@ -205,7 +205,7 @@ the value assigned to a variable that shows up more than once_. The files in the
 list are processed from the top down. For the same variable specified in file
 `a.env` and assigned a different value in file `b.env`, if `b.env` is
 listed below (after), then the value from `b.env` stands. For example, given the
-following declaration in `docker_compose.yml`:
+following declaration in `docker-compose.yml`:
 
 ```yaml
 services:
diff --git a/compose/compose-file/compose-file-v2.md b/compose/compose-file/compose-file-v2.md
index cf59a2a446..63fdb132b2 100644
--- a/compose/compose-file/compose-file-v2.md
+++ b/compose/compose-file/compose-file-v2.md
@@ -532,7 +532,7 @@ the value assigned to a variable that shows up more than once_. The files in the
 list are processed from the top down. For the same variable specified in file
 `a.env` and assigned a different value in file `b.env`, if `b.env` is
 listed below (after), then the value from `b.env` stands. For example, given the
-following declaration in `docker_compose.yml`:
+following declaration in `docker-compose.yml`:
 
 ```yaml
 services:
diff --git a/compose/compose-file/index.md b/compose/compose-file/index.md
index 76d4ec4dc7..82b52899a5 100644
--- a/compose/compose-file/index.md
+++ b/compose/compose-file/index.md
@@ -1001,7 +1001,7 @@ the value assigned to a variable that shows up more than once_. The files in the
 list are processed from the top down. For the same variable specified in file
 `a.env` and assigned a different value in file `b.env`, if `b.env` is
 listed below (after), then the value from `b.env` stands. For example, given the
-following declaration in `docker_compose.yml`:
+following declaration in `docker-compose.yml`:
 
 ```none
 services: