diff --git a/common/content/disable-acr.jsm b/common/content/disable-acr.jsm
index de231635..80b9032f 100644
--- a/common/content/disable-acr.jsm
+++ b/common/content/disable-acr.jsm
@@ -69,4 +69,4 @@ function chromeDocuments() {
 
 var EXPORTED_SYMBOLS = ["cleanup", "init"];
 
-// vim: set fdm=marker sw=4 ts=4 et:
+// vim: set fdm=marker sw=4 ts=4 et ft=javascript:
diff --git a/common/modules/bootstrap.jsm b/common/modules/bootstrap.jsm
index 833927fa..e25510e8 100644
--- a/common/modules/bootstrap.jsm
+++ b/common/modules/bootstrap.jsm
@@ -112,3 +112,4 @@ else
 
 }catch(e){ dump(e + "\n" + (e.stack || Error().stack)); Components.utils.reportError(e) }
 
+// vim: set fdm=marker sw=4 sts=4 et ft=javascript: