diff --git a/queries/r/highlights.scm b/queries/r/highlights.scm
old mode 100755
new mode 100644
index 784a54242..87b6ca36d
--- a/queries/r/highlights.scm
+++ b/queries/r/highlights.scm
@@ -101,6 +101,8 @@
   "}"
 ] @punctuation.bracket
 
+"," @punctuation.delimiter
+
 (dollar
   _
   "$" @operator)