diff --git a/Dockerfile.buildworker b/Dockerfile.buildworker
index d81b70d69..2c2ec6dd0 100644
--- a/Dockerfile.buildworker
+++ b/Dockerfile.buildworker
@@ -1,3 +1,4 @@
+# vim:ft=dockerfile
 FROM phusion/baseimage:0.9.15
 
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/Dockerfile.web b/Dockerfile.web
index 294fe2018..575332a3a 100644
--- a/Dockerfile.web
+++ b/Dockerfile.web
@@ -1,3 +1,4 @@
+# vim:ft=dockerfile
 FROM phusion/baseimage:0.9.15
 
 ENV DEBIAN_FRONTEND noninteractive
@@ -66,4 +67,4 @@ VOLUME ["/conf/stack", "/var/log", "/datastorage", "/tmp"]
 
 EXPOSE 443 80
 
-CMD ["/sbin/my_init"]
\ No newline at end of file
+CMD ["/sbin/my_init"]