diff --git a/ets2panda/ir/ets/etsUnionType.cpp b/ets2panda/ir/ets/etsUnionType.cpp
index b454c1bf79761e0fe45f30c16c014973df1187a6..cc316736480a4fdbf03f41b69580293317a2017b 100644
--- a/ets2panda/ir/ets/etsUnionType.cpp
+++ b/ets2panda/ir/ets/etsUnionType.cpp
@@ -98,8 +98,9 @@ checker::Type *ETSUnionType::GetType(checker::ETSChecker *checker)
 
     ArenaVector<checker::Type *> types(checker->Allocator()->Adapter());
 
-    for (auto *it : types_) {
-        types.push_back(it->GetType(checker));
+    for (auto *it : Types()) {
+        if (auto *type = it->GetType(checker))
+            types.push_back(type);
     }
 
     checker->Relation()->SetNode(this);
diff --git a/ets2panda/test/ast/compiler/ets/getType.ets b/ets2panda/test/ast/compiler/ets/getType.ets
new file mode 100644
index 0000000000000000000000000000000000000000..aee120c32a1fefaf602b94ac1517d558c1505785
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/getType.ets
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http: *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare type type_tuple_union = [string, boolean, number] | (this.mnum === other.mnum && this.mden === other.mden
+)[]
+
+/* @@? 15:62 Error SyntaxError: A 'this' type is available only as return type in a non-static method of a class or struct and extension functions. */
+/* @@? 15:66 Error SyntaxError: Unexpected token, expected ')'. */
+/* @@? 15:67 Error TypeError: Unresolved reference mnum */
+/* @@? 15:76 Error TypeError: Unresolved reference other */
+/* @@? 15:90 Error TypeError: Cannot reference 'this' in this context. */
+/* @@? 15:95 Error TypeError: Property 'mden' does not exist on type 'Error' */
+/* @@? 16:1 Error SyntaxError: Unexpected token ')'. */
+/* @@? 16:1 Error TypeError: Indexed access is not supported for such expression type. */
+/* @@? 16:3 Error SyntaxError: Unexpected token ']'. */
+/* @@? 27:67 Error SyntaxError: Unexpected token, expected ']'. */
\ No newline at end of file