diff --git a/.gitattributes b/.gitattributes
index 6cc18834..a9299ca1 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -7,4 +7,7 @@
 
 # Do not change external files
 external/**	-text
-DoConfig/fltk/**	-text
\ No newline at end of file
+DoConfig/fltk/**	-text
+
+# TSC files are not text, but 'git diff' likes to think they are
+*.tsc	binary