diff --git a/ets2panda/checker/ETSAnalyzerHelpers.cpp b/ets2panda/checker/ETSAnalyzerHelpers.cpp
index 79bccc53d1c0b0f6654d8be8c9d07e7cbbbac367..9e9aa36592d00bae94ac92856490c063a59fae2c 100644
--- a/ets2panda/checker/ETSAnalyzerHelpers.cpp
+++ b/ets2panda/checker/ETSAnalyzerHelpers.cpp
@@ -18,6 +18,24 @@
 
 namespace ark::es2panda::checker {
 
+static bool IsValidReceiverParameter(Type *const thisType)
+{
+    if (thisType == nullptr) {
+        return false;
+    }
+
+    if (thisType->IsETSArrayType() || thisType->IsETSTypeParameter()) {
+        return true;
+    }
+
+    if (!thisType->IsETSObjectType()) {
+        return false;
+    }
+
+    auto *const thisObjectType = thisType->AsETSObjectType();
+    return thisObjectType->HasObjectFlag(ETSObjectFlags::CLASS | ETSObjectFlags::INTERFACE);
+}
+
 void CheckExtensionIsShadowedInCurrentClassOrInterface(checker::ETSChecker *checker, checker::ETSObjectType *objType,
                                                        ir::ScriptFunction *extensionFunc, checker::Signature *signature)
 {
@@ -118,14 +136,11 @@ void CheckExtensionMethod(checker::ETSChecker *checker, ir::ScriptFunction *exte
     auto *const thisType =
         !extensionFunc->Signature()->Params().empty() ? extensionFunc->Signature()->Params()[0]->TsType() : nullptr;
 
-    // "Extension Functions" are only allowed for classes, interfaces, and arrays.
-    if (thisType != nullptr &&
-        (thisType->IsETSArrayType() ||
-         (thisType->IsETSObjectType() && thisType->AsETSObjectType()->HasObjectFlag(
-                                             // CC-OFFNXT(G.FMT.06-CPP) project code style
-                                             checker::ETSObjectFlags::CLASS | checker::ETSObjectFlags::INTERFACE)))) {
+    // "Extension Functions" are only allowed for classes, interfaces, arrays and type parameters extends from object.
+    if (IsValidReceiverParameter(thisType)) {
         // Skip for arrays (array does not contain a class definition) and checked class definition.
-        if (!thisType->IsETSArrayType() && thisType->Variable()->Declaration()->Node()->IsClassDefinition() &&
+        if (!thisType->IsETSArrayType() && !thisType->IsETSTypeParameter() &&
+            thisType->Variable()->Declaration()->Node()->IsClassDefinition() &&
             !thisType->Variable()->Declaration()->Node()->AsClassDefinition()->IsClassDefinitionChecked()) {
             thisType->Variable()->Declaration()->Node()->Check(checker);
         }
diff --git a/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter1.sts b/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter1.sts
new file mode 100644
index 0000000000000000000000000000000000000000..50a78ac81a9c3b64a97ee44bbae61ede7884c207
--- /dev/null
+++ b/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter1.sts
@@ -0,0 +1,31 @@
+/*
+ * 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://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+class A {
+    prop: number = 1
+}
+
+function foo<T extends A>(this: T) {
+    return this.prop
+}
+
+function demo(p1: A) {
+    return p1.foo()
+}
+
+function main() {
+    let a1 = new A()
+    assertTrue(demo(a1) == 1)
+}
\ No newline at end of file
diff --git a/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter2.sts b/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter2.sts
new file mode 100644
index 0000000000000000000000000000000000000000..0f4f00557af46a5c0bedb0b1d412c27c7f982736
--- /dev/null
+++ b/ets2panda/test/runtime/ets/extension_function_with_generic/receiver_type_is_type_parameter2.sts
@@ -0,0 +1,26 @@
+/*
+ * 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://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+interface A {
+    name: string
+}
+
+function foo<T extends A>(this: T) {
+    return 1
+}
+
+function demo(p1: A) {
+    assertTrue(p1.foo() == 1)
+}
\ No newline at end of file