diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..3cdbee86
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,9 @@
+# Denote all files that are truly binary and should not be modified.
+*.tedit binary
+*.lcom binary
+*.sketch binary
+*.dfasl binary
+*.TEDIT binary
+*.LCOM binary
+*.SKETCH binary
+*.DFASL binary