diff --git a/src/main/java/edu/kit/kastel/vads/compiler/parser/Parser.java b/src/main/java/edu/kit/kastel/vads/compiler/parser/Parser.java
index 57c9de8..f62d127 100644
--- a/src/main/java/edu/kit/kastel/vads/compiler/parser/Parser.java
+++ b/src/main/java/edu/kit/kastel/vads/compiler/parser/Parser.java
@@ -50,6 +50,9 @@ public class Parser {
     private FunctionTree parseFunction() {
         Keyword returnType = this.tokenSource.expectKeyword(KeywordType.INT);
         Identifier identifier = this.tokenSource.expectIdentifier();
+        if (!identifier.value().equals("main")) {
+            throw new ParseException("expected main function but got " + identifier);
+        }
         this.tokenSource.expectSeparator(SeparatorType.PAREN_OPEN);
         this.tokenSource.expectSeparator(SeparatorType.PAREN_CLOSE);
         BlockTree body = parseBlock();