diff --git a/ftplugin/cocci.vim b/ftplugin/cocci.vim
new file mode 100644
index 0000000..aad1bd6
--- /dev/null
+++ b/ftplugin/cocci.vim
@@ -0,0 +1,13 @@
+" Vim ftplugin file
+" Language:     Cocci (SmPL)
+" Author:       Alexander Færøy <ahf@0x90.dk>
+" License:      You may redistribute this under the same terms as Vim itself.
+
+if exists("b:did_ftplugin")
+    finish
+endif
+let b:did_ftplugin = 1
+
+setlocal commentstring=//\ %s
+
+" vim: set et ts=4 :