diff --git a/src/main/java/edu/kit/typicalc/model/parser/TypeAssumptionParser.java b/src/main/java/edu/kit/typicalc/model/parser/TypeAssumptionParser.java
index 92d52e6..33cb5d2 100644
--- a/src/main/java/edu/kit/typicalc/model/parser/TypeAssumptionParser.java
+++ b/src/main/java/edu/kit/typicalc/model/parser/TypeAssumptionParser.java
@@ -331,7 +331,11 @@ public class TypeAssumptionParser {
                             ParserResult<Type> result = handleInnerParenthesis(
                                     new Token(TokenType.EOF, "", "", -1));
                             if (result.isError()) {
-                                return result.castError();
+                                return result
+                                        // replace dummy EOF token
+                                        .modifyError(err ->
+                                                err.withToken(t, ParseError.ErrorType.TYPE_ASSUMPTION_ERROR))
+                                        .castError();
                             } else {
                                 parsedType = Optional.of(result.getResult());
                                 stateParenthesis = Optional.empty();
diff --git a/src/test/java/edu/kit/typicalc/model/parser/TypeAssumptionParserTest.java b/src/test/java/edu/kit/typicalc/model/parser/TypeAssumptionParserTest.java
index ac6d6ca..74243a5 100644
--- a/src/test/java/edu/kit/typicalc/model/parser/TypeAssumptionParserTest.java
+++ b/src/test/java/edu/kit/typicalc/model/parser/TypeAssumptionParserTest.java
@@ -359,6 +359,16 @@ class TypeAssumptionParserTest {
                 e);
     }
 
+    @Test
+    void errorCase4() {
+        ParseError e = parse("s:()");
+        assertEquals(ParseError
+                        .unexpectedToken(new Token(Token.TokenType.RIGHT_PARENTHESIS, ")", "s:()", 3),
+                                ParseError.ErrorType.TYPE_ASSUMPTION_ERROR)
+                        .expectedInput(ExpectedInput.TYPE),
+                e);
+    }
+
     static ParseError parse(String input) {
         return new TypeAssumptionParser().parse(input).unwrapError();
     }