diff --git a/ide/syntaxes/maeel.tmLanguage.json b/ide/syntaxes/maeel.tmLanguage.json
index 453ce570..ce9ef093 100644
--- a/ide/syntaxes/maeel.tmLanguage.json
+++ b/ide/syntaxes/maeel.tmLanguage.json
@@ -11,7 +11,7 @@
 			"name": "comment.line.maeel"
 		},
 		{
-			"match": "(fun)\\s+([a-zA-Z_][a-zA-Z0-9_]*)\\s+([a-zA-Z_\\s][a-zA-Z0-9_\\s]*)",
+			"match": "(fun)\\s+([a-zA-Z_][a-zA-Z0-9_]*)\\s+([a-zA-Z_\\s][a-zA-Z0-9_\\s]*)?",
 			"captures": {
 				"2": {
 					"name": "keyword.control.maeel"