diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000000..1ad886cf2491c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,5 @@
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Declare files that will always have LF line endings on checkout.
+*.y text eol=lf