diff --git a/Syntaxes/Chapel.tmLanguage b/Syntaxes/Chapel.tmLanguage
index fc048be..2d277d7 100644
--- a/Syntaxes/Chapel.tmLanguage
+++ b/Syntaxes/Chapel.tmLanguage
@@ -269,7 +269,7 @@
 		<dict>
 			<key>match</key>
 			<string>(?x)\b(
-              	 abs | close | exit| max | min | open | read | readln | sqrt | write | writeln
+              	 abs | close | exit| max | min | open | read | readln | sqrt | write | writeln | writef | readf
 			
 			)\b</string>
 			<key>name</key>