diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..9031d13
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+# Mark generated completion files as vendored
+contrib/completions/* linguist-vendored
+contrib/completions/gen_completions linguist-vendored=false