diff --git a/lexer/lexer.go b/lexer/lexer.go
index d5e1bf7..c49154c 100644
--- a/lexer/lexer.go
+++ b/lexer/lexer.go
@@ -192,6 +192,16 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
 		token.kind = TokenKindComma
 		lexer.addToken(token)
 		err = lexer.nextRune()
+	case '(':
+		token := lexer.newToken()
+		token.kind = TokenKindLParen
+		lexer.addToken(token)
+		err = lexer.nextRune()
+	case ')':
+		token := lexer.newToken()
+		token.kind = TokenKindRParen
+		lexer.addToken(token)
+		err = lexer.nextRune()
 	case '[':
 		token := lexer.newToken()
 		token.kind = TokenKindLBracket
diff --git a/lexer/lexer_test.go b/lexer/lexer_test.go
index 932c9be..623410c 100644
--- a/lexer/lexer_test.go
+++ b/lexer/lexer_test.go
@@ -138,6 +138,8 @@ func TestTokenizeAll (test *testing.T) {
 		quickToken(1, TokenKindDot, nil),
 		quickToken(1, TokenKindComma, nil),
 		quickToken(2, TokenKindElipsis, nil),
+		quickToken(1, TokenKindLParen, nil),
+		quickToken(1, TokenKindRParen, nil),
 		quickToken(1, TokenKindLBracket, nil),
 		quickToken(1, TokenKindRBracket, nil),
 		quickToken(1, TokenKindLBrace, nil),
diff --git a/lexer/token.go b/lexer/token.go
index c8b6624..033bd06 100644
--- a/lexer/token.go
+++ b/lexer/token.go
@@ -28,6 +28,8 @@ const (
         TokenKindElipsis
         TokenKindComma
         
+        TokenKindLParen
+        TokenKindRParen
         TokenKindLBracket
         TokenKindRBracket
         TokenKindLBrace
@@ -166,6 +168,10 @@ func (tokenKind TokenKind) Describe () (description string) {
 		description = "Elipsis"
 	case TokenKindComma:
 		description = "Comma"
+	case TokenKindLParen:
+		description = "LParen"
+	case TokenKindRParen:
+		description = "RParen"
 	case TokenKindLBracket:
 		description = "LBracket"
 	case TokenKindRBracket:
diff --git a/parser/enum.go b/parser/enum.go
index 8c71e0c..92f01ec 100644
--- a/parser/enum.go
+++ b/parser/enum.go
@@ -73,9 +73,11 @@ func (parser *ParsingOperation) parseEnumMembers (
 		if err != nil { return }
 	
 		// parse default value
-		member.value, err = parser.parseArgument()
-		into.members = append(into.members, member)
-		if err != nil { return }
+		if !parser.token.Is(lexer.TokenKindNewline) {
+			member.value, err = parser.parseArgument()
+			into.members = append(into.members, member)
+			if err != nil { return }
+		}
 
 		err = parser.expect(lexer.TokenKindNewline)
 		if err != nil { return }
diff --git a/parser/type-notation.go b/parser/type-notation.go
index c28bbe7..e72ab20 100644
--- a/parser/type-notation.go
+++ b/parser/type-notation.go
@@ -69,4 +69,3 @@ func (parser *ParsingOperation) parseType () (what Type, err error) {
 
 	return
 }
-
diff --git a/tests/lexer/all.arf b/tests/lexer/all.arf
index aeacf53..950ece0 100644
--- a/tests/lexer/all.arf
+++ b/tests/lexer/all.arf
@@ -1,3 +1,3 @@
 :arf
---- rw -> -349820394 932748397 239485.37520 "hello world!\n" 'E' helloWorld:.,..[]{}
+--- rw -> -349820394 932748397 239485.37520 "hello world!\n" 'E' helloWorld:.,..()[]{}
 + - ++ -- * / @ ! % %= ~ ~= = == != < <= << <<= > >= >> >>= | |= || & &= && ^ ^=