diff --git a/dlls/winemac.drv/.gitattributes b/dlls/winemac.drv/.gitattributes
new file mode 100644
index 00000000000..4e9525e29c6
--- /dev/null
+++ b/dlls/winemac.drv/.gitattributes
@@ -0,0 +1,2 @@
+*.m diff=objc
+*.h diff=objc