diff --git a/src/main/antlr/Expression.g4 b/src/main/antlr/Expression.g4
index 2c9ada6e94539b52887742e18dedbdc8c7422047..f005c7ef6b86f62cd352a02a3be71367a1fb1651 100644
--- a/src/main/antlr/Expression.g4
+++ b/src/main/antlr/Expression.g4
@@ -7,9 +7,10 @@ package sample;
 expression: expression PLUS expression # Addition
             |   expression TIMES expression # Multiplication
             |   INT # Integer
-            |   '(' expression ')' # ParenthesedExpression ;
-
+            |   OPENING_PARENTHESIS expression CLOSING_PARENTHESIS # InParenthesesExpression ;
 
+OPENING_PARENTHESIS: '(';
+CLOSING_PARENTHESIS: ')';
 PLUS : '+';
 TIMES : '*';
 INT : [0-9]+ ;
\ No newline at end of file
diff --git a/src/main/java/sample/visitor/EvaluationVisitor.java b/src/main/java/sample/visitor/EvaluationVisitor.java
index d4935bd80e4da0c7c4ccd7a4a08ad24198724575..5543ed2b45d532f91e64ab8dd8b892f111017eed 100644
--- a/src/main/java/sample/visitor/EvaluationVisitor.java
+++ b/src/main/java/sample/visitor/EvaluationVisitor.java
@@ -5,6 +5,11 @@ import sample.ExpressionParser;
 
 public class EvaluationVisitor extends ExpressionBaseVisitor<Integer> {
 
+    @Override
+    public Integer visitInParenthesesExpression(ExpressionParser.InParenthesesExpressionContext ctx) {
+        return ctx.expression().accept(this);
+    }
+
     @Override
     public Integer visitAddition(ExpressionParser.AdditionContext ctx) {
         return ctx.expression().getFirst().accept(this) + ctx.expression().getLast().accept(this);
diff --git a/src/main/java/sample/visitor/Main.java b/src/main/java/sample/visitor/Main.java
index 32a1fb2e06dc328bd3b9e8278ebd3fc12cab73af..f423ce9eb376acdb48797882fe317a3945cd0eb9 100644
--- a/src/main/java/sample/visitor/Main.java
+++ b/src/main/java/sample/visitor/Main.java
@@ -24,7 +24,8 @@ public class Main {
             EvaluationVisitor visitor = new EvaluationVisitor();
 
 
-            System.out.println(visitor.visit(tree));
+            Integer value = visitor.visit(tree);
+            System.out.println(value);
 
             //show AST in console
             System.out.println(tree.toStringTree(parser));