diff --git a/home/vim/default.nix b/home/vim/default.nix
index ec208b9..63dc47a 100644
--- a/home/vim/default.nix
+++ b/home/vim/default.nix
@@ -47,6 +47,10 @@
   };
 
   xdg.configFile = {
+    "nvim/ftdetect" = {
+      source = ./ftdetect;
+    };
+
     "nvim/plugin" = {
       source = ./plugin;
     };
diff --git a/home/vim/ftdetect/automake.vim b/home/vim/ftdetect/automake.vim
new file mode 100644
index 0000000..5cc73b0
--- /dev/null
+++ b/home/vim/ftdetect/automake.vim
@@ -0,0 +1,2 @@
+" Use Automake filetype for `local.am` files, explicit `set` to force override
+au BufNewFile,BufRead local.am set filetype=automake
diff --git a/home/vim/ftdetect/tikz.vim b/home/vim/ftdetect/tikz.vim
new file mode 100644
index 0000000..7327b11
--- /dev/null
+++ b/home/vim/ftdetect/tikz.vim
@@ -0,0 +1,2 @@
+" Use LaTeX filetype for TikZ files
+au BufNewFile,BufRead *.tikz setfiletype tex