diff --git a/Dockerfiles/alpine b/Dockerfiles/alpine
index 367a3cf..78a78b6 100644
--- a/Dockerfiles/alpine
+++ b/Dockerfiles/alpine
@@ -1,3 +1,5 @@
+# vim: ft=Dockerfile
+
 FROM alpine:latest
 
 RUN apk add --no-cache git meson alpine-sdk libinput-dev wayland-dev wayland-protocols mesa-dev libxkbcommon-dev eudev-dev pixman-dev gtkmm3-dev jsoncpp-dev libnl3-dev pulseaudio-dev libmpdclient-dev scdoc
diff --git a/Dockerfiles/archlinux b/Dockerfiles/archlinux
index de0f86c..9197fb8 100644
--- a/Dockerfiles/archlinux
+++ b/Dockerfiles/archlinux
@@ -1,3 +1,5 @@
+# vim: ft=Dockerfile
+
 FROM archlinux/base:latest
 
 RUN pacman -Syu --noconfirm && \
diff --git a/Dockerfiles/debian b/Dockerfiles/debian
index b6cda88..8d7a065 100644
--- a/Dockerfiles/debian
+++ b/Dockerfiles/debian
@@ -1,3 +1,5 @@
+# vim: ft=Dockerfile
+
 FROM debian:sid
 
 RUN apt-get update && \
diff --git a/Dockerfiles/fedora b/Dockerfiles/fedora
index 4e61055..af88607 100644
--- a/Dockerfiles/fedora
+++ b/Dockerfiles/fedora
@@ -1,3 +1,5 @@
+# vim: ft=Dockerfile
+
 FROM fedora:30
 
 RUN dnf install sway meson git libinput-devel wayland-devel wayland-protocols-devel egl-wayland-devel mesa-libEGL-devel mesa-libGLES-devel mesa-libgbm-devel libxkbcommon-devel libudev-devel pixman-devel gtkmm30-devel jsoncpp-devel scdoc -y && \
diff --git a/Dockerfiles/opensuse b/Dockerfiles/opensuse
index 8101b0e..c54777e 100644
--- a/Dockerfiles/opensuse
+++ b/Dockerfiles/opensuse
@@ -1,3 +1,5 @@
+# vim: ft=Dockerfile
+
 FROM opensuse/tumbleweed:latest
 
 RUN zypper -n up && \