diff --git a/after/ftdetect/cpp.vim b/after/ftdetect/cpp.vim
new file mode 100644
index 0000000..c798af0
--- /dev/null
+++ b/after/ftdetect/cpp.vim
@@ -0,0 +1,2 @@
+" Force *.def to C++ filetype for LLVM
+au BufNewFile,BufReadPost *.def set filetype=cpp