diff --git a/.gitattributes b/.gitattributes
index 8560b794c0..899473ab0f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1,5 @@
 # Declare files that always have LF line endings on checkout
 * text eol=lf
+# Denote all files that are truly binary and should not be modified
+*.bmp binary
+*.ttf binary