diff --git a/libraries/ast/.gitignore b/libraries/ast/.gitignore
index 04ede68cbce..437071a215d 100644
--- a/libraries/ast/.gitignore
+++ b/libraries/ast/.gitignore
@@ -14,3 +14,4 @@
 /sun211.tex
 /sun211.pdf
 /version.h
+/*.trs