diff --git a/.gitattributes b/.gitattributes
index 2bb23199..437e4bef 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,8 +1,11 @@
-*   text=lf
+*   text=auto
 *.wrl   -diff
 *.pack  binary
 *.png   binary
 *.step  binary
+*.stp   binary
+*.STEP  binary
+*.STP   binary
 *.wings binary
 *.svg   binary
 *.pdf   binary